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Finding the Fourth Proportional to 99,979,645.80, 149,969,468.70 and 28,176,061.80

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Solution

The fourth proportional to 99,979,645.80, 149,969,468.70 and 28,176,061.80 is: 42,264,092.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,979,645.80 : 149,969,468.70 = 28,176,061.80 : x
  2. Step 2: Convert to fraction form
    99,979,645.80/149,969,468.70 = 28,176,061.80/x
  3. Step 3: Cross multiply
    99,979,645.80x = 149,969,468.70 × 28,176,061.80
  4. Step 4: Simplify right side
    99,979,645.80x = 4,225,549,018,204,365.50
  5. Step 5: Solve for x
    x = 4,225,549,018,204,365.50/99,979,645.80
  6. Step 6: Final answer
    x = 42,264,092.70

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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.