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Finding the Fourth Proportional to 66,426.70, 99,640.05 and 59,865.70

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Solution

The fourth proportional to 66,426.70, 99,640.05 and 59,865.70 is: 89,798.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,426.70 : 99,640.05 = 59,865.70 : x
  2. Step 2: Convert to fraction form
    66,426.70/99,640.05 = 59,865.70/x
  3. Step 3: Cross multiply
    66,426.70x = 99,640.05 × 59,865.70
  4. Step 4: Simplify right side
    66,426.70x = 5,965,021,341.29
  5. Step 5: Solve for x
    x = 5,965,021,341.29/66,426.70
  6. Step 6: Final answer
    x = 89,798.55

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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.