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Finding the Fourth Proportional to 338,713.60, 508,070.63 and 86,013.04

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Solution

The fourth proportional to 338,713.60, 508,070.63 and 86,013.04 is: 129,019.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,713.60 : 508,070.63 = 86,013.04 : x
  2. Step 2: Convert to fraction form
    338,713.60/508,070.63 = 86,013.04/x
  3. Step 3: Cross multiply
    338,713.60x = 508,070.63 × 86,013.04
  4. Step 4: Simplify right side
    338,713.60x = 43,700,698,834.68
  5. Step 5: Solve for x
    x = 43,700,698,834.68/338,713.60
  6. Step 6: Final answer
    x = 129,019.62

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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.