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Finding the Fourth Proportional to 100,587.16, 138,818.58 and 64,851.58

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Solution

The fourth proportional to 100,587.16, 138,818.58 and 64,851.58 is: 89,500.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,587.16 : 138,818.58 = 64,851.58 : x
  2. Step 2: Convert to fraction form
    100,587.16/138,818.58 = 64,851.58/x
  3. Step 3: Cross multiply
    100,587.16x = 138,818.58 × 64,851.58
  4. Step 4: Simplify right side
    100,587.16x = 9,002,604,246.36
  5. Step 5: Solve for x
    x = 9,002,604,246.36/100,587.16
  6. Step 6: Final answer
    x = 89,500.53

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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.