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Finding the Fourth Proportional to 120,856.60, 181,479.30 and 87,808.60

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Solution

The fourth proportional to 120,856.60, 181,479.30 and 87,808.60 is: 131,854.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,856.60 : 181,479.30 = 87,808.60 : x
  2. Step 2: Convert to fraction form
    120,856.60/181,479.30 = 87,808.60/x
  3. Step 3: Cross multiply
    120,856.60x = 181,479.30 × 87,808.60
  4. Step 4: Simplify right side
    120,856.60x = 15,935,443,261.98
  5. Step 5: Solve for x
    x = 15,935,443,261.98/120,856.60
  6. Step 6: Final answer
    x = 131,854.14

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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.