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Finding the Fourth Proportional to 66,140.65, 99,142.99 and 26,143.36

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Solution

The fourth proportional to 66,140.65, 99,142.99 and 26,143.36 is: 39,188.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,140.65 : 99,142.99 = 26,143.36 : x
  2. Step 2: Convert to fraction form
    66,140.65/99,142.99 = 26,143.36/x
  3. Step 3: Cross multiply
    66,140.65x = 99,142.99 × 26,143.36
  4. Step 4: Simplify right side
    66,140.65x = 2,591,930,565.83
  5. Step 5: Solve for x
    x = 2,591,930,565.83/66,140.65
  6. Step 6: Final answer
    x = 39,188.16

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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.