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Finding the Fourth Proportional to 66,391,324.80, 99,586,987.20 and 55,053,916.80

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Solution

The fourth proportional to 66,391,324.80, 99,586,987.20 and 55,053,916.80 is: 82,580,875.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391,324.80 : 99,586,987.20 = 55,053,916.80 : x
  2. Step 2: Convert to fraction form
    66,391,324.80/99,586,987.20 = 55,053,916.80/x
  3. Step 3: Cross multiply
    66,391,324.80x = 99,586,987.20 × 55,053,916.80
  4. Step 4: Simplify right side
    66,391,324.80x = 5,482,653,707,671,465
  5. Step 5: Solve for x
    x = 5,482,653,707,671,465/66,391,324.80
  6. Step 6: Final answer
    x = 82,580,875.20

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.