Home / 121,245,221.70-181,867,832.55-72,872,280.90

Finding the Fourth Proportional to 121,245,221.70, 181,867,832.55 and 72,872,280.90

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Solution

The fourth proportional to 121,245,221.70, 181,867,832.55 and 72,872,280.90 is: 109,308,421.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,245,221.70 : 181,867,832.55 = 72,872,280.90 : x
  2. Step 2: Convert to fraction form
    121,245,221.70/181,867,832.55 = 72,872,280.90/x
  3. Step 3: Cross multiply
    121,245,221.70x = 181,867,832.55 × 72,872,280.90
  4. Step 4: Simplify right side
    121,245,221.70x = 13,253,123,780,257,766
  5. Step 5: Solve for x
    x = 13,253,123,780,257,766/121,245,221.70
  6. Step 6: Final answer
    x = 109,308,421.35

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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.