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Finding the Fourth Proportional to 338,706.01, 508,059.24 and 86,005.45

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Solution

The fourth proportional to 338,706.01, 508,059.24 and 86,005.45 is: 129,008.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,706.01 : 508,059.24 = 86,005.45 : x
  2. Step 2: Convert to fraction form
    338,706.01/508,059.24 = 86,005.45/x
  3. Step 3: Cross multiply
    338,706.01x = 508,059.24 × 86,005.45
  4. Step 4: Simplify right side
    338,706.01x = 43,695,861,017.58
  5. Step 5: Solve for x
    x = 43,695,861,017.58/338,706.01
  6. Step 6: Final answer
    x = 129,008.23

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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.