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Finding the Fourth Proportional to 121,437.20, 182,155.80 and 42,543.20

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Solution

The fourth proportional to 121,437.20, 182,155.80 and 42,543.20 is: 63,814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,437.20 : 182,155.80 = 42,543.20 : x
  2. Step 2: Convert to fraction form
    121,437.20/182,155.80 = 42,543.20/x
  3. Step 3: Cross multiply
    121,437.20x = 182,155.80 × 42,543.20
  4. Step 4: Simplify right side
    121,437.20x = 7,749,490,630.56
  5. Step 5: Solve for x
    x = 7,749,490,630.56/121,437.20
  6. Step 6: Final answer
    x = 63,814.80

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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.