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Finding the Fourth Proportional to 64,390.88, 88,863.68 and 36,098.40

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Solution

The fourth proportional to 64,390.88, 88,863.68 and 36,098.40 is: 49,818.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,390.88 : 88,863.68 = 36,098.40 : x
  2. Step 2: Convert to fraction form
    64,390.88/88,863.68 = 36,098.40/x
  3. Step 3: Cross multiply
    64,390.88x = 88,863.68 × 36,098.40
  4. Step 4: Simplify right side
    64,390.88x = 3,207,836,666.11
  5. Step 5: Solve for x
    x = 3,207,836,666.11/64,390.88
  6. Step 6: Final answer
    x = 49,818.18

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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.