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Finding the Fourth Proportional to 63,987, 88,441.90 and 56,375.16

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Solution

The fourth proportional to 63,987, 88,441.90 and 56,375.16 is: 77,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,987 : 88,441.90 = 56,375.16 : x
  2. Step 2: Convert to fraction form
    63,987/88,441.90 = 56,375.16/x
  3. Step 3: Cross multiply
    63,987x = 88,441.90 × 56,375.16
  4. Step 4: Simplify right side
    63,987x = 4,985,926,263.20
  5. Step 5: Solve for x
    x = 4,985,926,263.20/63,987
  6. Step 6: Final answer
    x = 77,920.93

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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.