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Finding the Fourth Proportional to 86,935.60, 130,489.80 and 42,612.40

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Solution

The fourth proportional to 86,935.60, 130,489.80 and 42,612.40 is: 63,960.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,935.60 : 130,489.80 = 42,612.40 : x
  2. Step 2: Convert to fraction form
    86,935.60/130,489.80 = 42,612.40/x
  3. Step 3: Cross multiply
    86,935.60x = 130,489.80 × 42,612.40
  4. Step 4: Simplify right side
    86,935.60x = 5,560,483,553.52
  5. Step 5: Solve for x
    x = 5,560,483,553.52/86,935.60
  6. Step 6: Final answer
    x = 63,960.95

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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.