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Finding the Fourth Proportional to 121,430.80, 182,113.80 and 42,536.80

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Solution

The fourth proportional to 121,430.80, 182,113.80 and 42,536.80 is: 63,793.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,430.80 : 182,113.80 = 42,536.80 : x
  2. Step 2: Convert to fraction form
    121,430.80/182,113.80 = 42,536.80/x
  3. Step 3: Cross multiply
    121,430.80x = 182,113.80 × 42,536.80
  4. Step 4: Simplify right side
    121,430.80x = 7,746,538,287.84
  5. Step 5: Solve for x
    x = 7,746,538,287.84/121,430.80
  6. Step 6: Final answer
    x = 63,793.85

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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.