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Finding the Fourth Proportional to 138,345.60, 207,615.60 and 59,516.40

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Solution

The fourth proportional to 138,345.60, 207,615.60 and 59,516.40 is: 89,316.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,345.60 : 207,615.60 = 59,516.40 : x
  2. Step 2: Convert to fraction form
    138,345.60/207,615.60 = 59,516.40/x
  3. Step 3: Cross multiply
    138,345.60x = 207,615.60 × 59,516.40
  4. Step 4: Simplify right side
    138,345.60x = 12,356,533,095.84
  5. Step 5: Solve for x
    x = 12,356,533,095.84/138,345.60
  6. Step 6: Final answer
    x = 89,316.42

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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.