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Finding the Fourth Proportional to 161,909.40, 242,791.20 and 73,117.20

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Solution

The fourth proportional to 161,909.40, 242,791.20 and 73,117.20 is: 109,642.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,909.40 : 242,791.20 = 73,117.20 : x
  2. Step 2: Convert to fraction form
    161,909.40/242,791.20 = 73,117.20/x
  3. Step 3: Cross multiply
    161,909.40x = 242,791.20 × 73,117.20
  4. Step 4: Simplify right side
    161,909.40x = 17,752,212,728.64
  5. Step 5: Solve for x
    x = 17,752,212,728.64/161,909.40
  6. Step 6: Final answer
    x = 109,642.88

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1.5x scale

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.