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Finding the Fourth Proportional to 73,105.20, 109,657.80 and 42,001.20

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Solution

The fourth proportional to 73,105.20, 109,657.80 and 42,001.20 is: 63,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,105.20 : 109,657.80 = 42,001.20 : x
  2. Step 2: Convert to fraction form
    73,105.20/109,657.80 = 42,001.20/x
  3. Step 3: Cross multiply
    73,105.20x = 109,657.80 × 42,001.20
  4. Step 4: Simplify right side
    73,105.20x = 4,605,759,189.36
  5. Step 5: Solve for x
    x = 4,605,759,189.36/73,105.20
  6. Step 6: Final answer
    x = 63,001.80

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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.