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Finding the Fourth Proportional to 151,468.74, 209,027.86 and 86,920.76

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Solution

The fourth proportional to 151,468.74, 209,027.86 and 86,920.76 is: 119,951.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,468.74 : 209,027.86 = 86,920.76 : x
  2. Step 2: Convert to fraction form
    151,468.74/209,027.86 = 86,920.76/x
  3. Step 3: Cross multiply
    151,468.74x = 209,027.86 × 86,920.76
  4. Step 4: Simplify right side
    151,468.74x = 18,168,860,757.64
  5. Step 5: Solve for x
    x = 18,168,860,757.64/151,468.74
  6. Step 6: Final answer
    x = 119,951.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.