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Finding the Fourth Proportional to 279,927,591.69, 419,875,693.03 and 85,838,474.05

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Solution

The fourth proportional to 279,927,591.69, 419,875,693.03 and 85,838,474.05 is: 128,752,898.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,927,591.69 : 419,875,693.03 = 85,838,474.05 : x
  2. Step 2: Convert to fraction form
    279,927,591.69/419,875,693.03 = 85,838,474.05/x
  3. Step 3: Cross multiply
    279,927,591.69x = 419,875,693.03 × 85,838,474.05
  4. Step 4: Simplify right side
    279,927,591.69x = 36,041,488,779,438,168
  5. Step 5: Solve for x
    x = 36,041,488,779,438,168/279,927,591.69
  6. Step 6: Final answer
    x = 128,752,898.42

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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.