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Finding the Fourth Proportional to 83,898.76, 125,700.51 and 78,904.20

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Solution

The fourth proportional to 83,898.76, 125,700.51 and 78,904.20 is: 118,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,898.76 : 125,700.51 = 78,904.20 : x
  2. Step 2: Convert to fraction form
    83,898.76/125,700.51 = 78,904.20/x
  3. Step 3: Cross multiply
    83,898.76x = 125,700.51 × 78,904.20
  4. Step 4: Simplify right side
    83,898.76x = 9,918,298,181.14
  5. Step 5: Solve for x
    x = 9,918,298,181.14/83,898.76
  6. Step 6: Final answer
    x = 118,217.46

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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.