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Finding the Fourth Proportional to 121,141.20, 181,711.80 and 61,957.20

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Solution

The fourth proportional to 121,141.20, 181,711.80 and 61,957.20 is: 92,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,141.20 : 181,711.80 = 61,957.20 : x
  2. Step 2: Convert to fraction form
    121,141.20/181,711.80 = 61,957.20/x
  3. Step 3: Cross multiply
    121,141.20x = 181,711.80 × 61,957.20
  4. Step 4: Simplify right side
    121,141.20x = 11,258,354,334.96
  5. Step 5: Solve for x
    x = 11,258,354,334.96/121,141.20
  6. Step 6: Final answer
    x = 92,935.80

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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.