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Finding the Fourth Proportional to 66,537.80, 99,806.70 and 53,415.80

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Solution

The fourth proportional to 66,537.80, 99,806.70 and 53,415.80 is: 80,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,537.80 : 99,806.70 = 53,415.80 : x
  2. Step 2: Convert to fraction form
    66,537.80/99,806.70 = 53,415.80/x
  3. Step 3: Cross multiply
    66,537.80x = 99,806.70 × 53,415.80
  4. Step 4: Simplify right side
    66,537.80x = 5,331,254,725.86
  5. Step 5: Solve for x
    x = 5,331,254,725.86/66,537.80
  6. Step 6: Final answer
    x = 80,123.70

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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.