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Finding the Fourth Proportional to 66,391,315.80, 99,586,973.70 and 55,053,907.80

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Solution

The fourth proportional to 66,391,315.80, 99,586,973.70 and 55,053,907.80 is: 82,580,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391,315.80 : 99,586,973.70 = 55,053,907.80 : x
  2. Step 2: Convert to fraction form
    66,391,315.80/99,586,973.70 = 55,053,907.80/x
  3. Step 3: Cross multiply
    66,391,315.80x = 99,586,973.70 × 55,053,907.80
  4. Step 4: Simplify right side
    66,391,315.80x = 5,482,652,068,160,825
  5. Step 5: Solve for x
    x = 5,482,652,068,160,825/66,391,315.80
  6. Step 6: Final answer
    x = 82,580,861.70

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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.