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Finding the Fourth Proportional to 272,169,019.20, 408,253,528.80 and 99,588,475.20

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Solution

The fourth proportional to 272,169,019.20, 408,253,528.80 and 99,588,475.20 is: 149,382,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,169,019.20 : 408,253,528.80 = 99,588,475.20 : x
  2. Step 2: Convert to fraction form
    272,169,019.20/408,253,528.80 = 99,588,475.20/x
  3. Step 3: Cross multiply
    272,169,019.20x = 408,253,528.80 × 99,588,475.20
  4. Step 4: Simplify right side
    272,169,019.20x = 40,657,346,428,211,288
  5. Step 5: Solve for x
    x = 40,657,346,428,211,288/272,169,019.20
  6. Step 6: Final answer
    x = 149,382,712.80

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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.