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Finding the Fourth Proportional to 138,632.60, 207,948.90 and 124,117.40

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Solution

The fourth proportional to 138,632.60, 207,948.90 and 124,117.40 is: 186,176.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,632.60 : 207,948.90 = 124,117.40 : x
  2. Step 2: Convert to fraction form
    138,632.60/207,948.90 = 124,117.40/x
  3. Step 3: Cross multiply
    138,632.60x = 207,948.90 × 124,117.40
  4. Step 4: Simplify right side
    138,632.60x = 25,810,076,800.86
  5. Step 5: Solve for x
    x = 25,810,076,800.86/138,632.60
  6. Step 6: Final answer
    x = 186,176.10

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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.