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Finding the Fourth Proportional to 91,881.90, 126,808.74 and 56,064.30

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Solution

The fourth proportional to 91,881.90, 126,808.74 and 56,064.30 is: 77,375.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,881.90 : 126,808.74 = 56,064.30 : x
  2. Step 2: Convert to fraction form
    91,881.90/126,808.74 = 56,064.30/x
  3. Step 3: Cross multiply
    91,881.90x = 126,808.74 × 56,064.30
  4. Step 4: Simplify right side
    91,881.90x = 7,109,443,241.98
  5. Step 5: Solve for x
    x = 7,109,443,241.98/91,881.90
  6. Step 6: Final answer
    x = 77,375.88

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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.