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Finding the Fourth Proportional to 83,870.92, 115,697.28 and 63,694.36

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Solution

The fourth proportional to 83,870.92, 115,697.28 and 63,694.36 is: 87,864.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,870.92 : 115,697.28 = 63,694.36 : x
  2. Step 2: Convert to fraction form
    83,870.92/115,697.28 = 63,694.36/x
  3. Step 3: Cross multiply
    83,870.92x = 115,697.28 × 63,694.36
  4. Step 4: Simplify right side
    83,870.92x = 7,369,264,203.34
  5. Step 5: Solve for x
    x = 7,369,264,203.34/83,870.92
  6. Step 6: Final answer
    x = 87,864.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.