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Finding the Fourth Proportional to 121,247.30, 181,870.95 and 102,001.70

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Solution

The fourth proportional to 121,247.30, 181,870.95 and 102,001.70 is: 153,002.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,247.30 : 181,870.95 = 102,001.70 : x
  2. Step 2: Convert to fraction form
    121,247.30/181,870.95 = 102,001.70/x
  3. Step 3: Cross multiply
    121,247.30x = 181,870.95 × 102,001.70
  4. Step 4: Simplify right side
    121,247.30x = 18,551,146,080.62
  5. Step 5: Solve for x
    x = 18,551,146,080.62/121,247.30
  6. Step 6: Final answer
    x = 153,002.55

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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.