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Finding the Fourth Proportional to 138,834.60, 208,349.10 and 60,005.40

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Solution

The fourth proportional to 138,834.60, 208,349.10 and 60,005.40 is: 90,050.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,834.60 : 208,349.10 = 60,005.40 : x
  2. Step 2: Convert to fraction form
    138,834.60/208,349.10 = 60,005.40/x
  3. Step 3: Cross multiply
    138,834.60x = 208,349.10 × 60,005.40
  4. Step 4: Simplify right side
    138,834.60x = 12,502,071,085.14
  5. Step 5: Solve for x
    x = 12,502,071,085.14/138,834.60
  6. Step 6: Final answer
    x = 90,050.11

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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.