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Finding the Fourth Proportional to 63,689.66, 87,930.12 and 42,197.60

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Solution

The fourth proportional to 63,689.66, 87,930.12 and 42,197.60 is: 58,258.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,689.66 : 87,930.12 = 42,197.60 : x
  2. Step 2: Convert to fraction form
    63,689.66/87,930.12 = 42,197.60/x
  3. Step 3: Cross multiply
    63,689.66x = 87,930.12 × 42,197.60
  4. Step 4: Simplify right side
    63,689.66x = 3,710,440,031.71
  5. Step 5: Solve for x
    x = 3,710,440,031.71/63,689.66
  6. Step 6: Final answer
    x = 58,258.12

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1.5x scale

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.