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Finding the Fourth Proportional to 78,338.25, 108,002.39 and 62,259.25

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Solution

The fourth proportional to 78,338.25, 108,002.39 and 62,259.25 is: 85,834.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,338.25 : 108,002.39 = 62,259.25 : x
  2. Step 2: Convert to fraction form
    78,338.25/108,002.39 = 62,259.25/x
  3. Step 3: Cross multiply
    78,338.25x = 108,002.39 × 62,259.25
  4. Step 4: Simplify right side
    78,338.25x = 6,724,146,948.30
  5. Step 5: Solve for x
    x = 6,724,146,948.30/78,338.25
  6. Step 6: Final answer
    x = 85,834.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.