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Finding the Fourth Proportional to 115,127.40, 171,881.61 and 87,967.60

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Solution

The fourth proportional to 115,127.40, 171,881.61 and 87,967.60 is: 131,332.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,127.40 : 171,881.61 = 87,967.60 : x
  2. Step 2: Convert to fraction form
    115,127.40/171,881.61 = 87,967.60/x
  3. Step 3: Cross multiply
    115,127.40x = 171,881.61 × 87,967.60
  4. Step 4: Simplify right side
    115,127.40x = 15,120,013,260.57
  5. Step 5: Solve for x
    x = 15,120,013,260.57/115,127.40
  6. Step 6: Final answer
    x = 131,332.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.