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Finding the Fourth Proportional to 91,892.88, 126,825.93 and 56,103.66

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Solution

The fourth proportional to 91,892.88, 126,825.93 and 56,103.66 is: 77,431.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,892.88 : 126,825.93 = 56,103.66 : x
  2. Step 2: Convert to fraction form
    91,892.88/126,825.93 = 56,103.66/x
  3. Step 3: Cross multiply
    91,892.88x = 126,825.93 × 56,103.66
  4. Step 4: Simplify right side
    91,892.88x = 7,115,398,855.90
  5. Step 5: Solve for x
    x = 7,115,398,855.90/91,892.88
  6. Step 6: Final answer
    x = 77,431.45

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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.