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Finding the Fourth Proportional to 138,518.40, 207,788.40 and 59,635.20

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Solution

The fourth proportional to 138,518.40, 207,788.40 and 59,635.20 is: 89,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,518.40 : 207,788.40 = 59,635.20 : x
  2. Step 2: Convert to fraction form
    138,518.40/207,788.40 = 59,635.20/x
  3. Step 3: Cross multiply
    138,518.40x = 207,788.40 × 59,635.20
  4. Step 4: Simplify right side
    138,518.40x = 12,391,502,791.68
  5. Step 5: Solve for x
    x = 12,391,502,791.68/138,518.40
  6. Step 6: Final answer
    x = 89,457.45

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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.