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Finding the Fourth Proportional to 76,742.32, 115,113.48 and 72,410.80

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Solution

The fourth proportional to 76,742.32, 115,113.48 and 72,410.80 is: 108,616.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,742.32 : 115,113.48 = 72,410.80 : x
  2. Step 2: Convert to fraction form
    76,742.32/115,113.48 = 72,410.80/x
  3. Step 3: Cross multiply
    76,742.32x = 115,113.48 × 72,410.80
  4. Step 4: Simplify right side
    76,742.32x = 8,335,459,177.58
  5. Step 5: Solve for x
    x = 8,335,459,177.58/76,742.32
  6. Step 6: Final answer
    x = 108,616.20

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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.