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Finding the Fourth Proportional to 86,793.60, 130,112.64 and 45,192.96

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Solution

The fourth proportional to 86,793.60, 130,112.64 and 45,192.96 is: 67,748.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,793.60 : 130,112.64 = 45,192.96 : x
  2. Step 2: Convert to fraction form
    86,793.60/130,112.64 = 45,192.96/x
  3. Step 3: Cross multiply
    86,793.60x = 130,112.64 × 45,192.96
  4. Step 4: Simplify right side
    86,793.60x = 5,880,175,335.01
  5. Step 5: Solve for x
    x = 5,880,175,335.01/86,793.60
  6. Step 6: Final answer
    x = 67,748.95

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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.