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Finding the Fourth Proportional to 91,915.70, 126,892.04 and 61,859.03

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Solution

The fourth proportional to 91,915.70, 126,892.04 and 61,859.03 is: 85,398.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,915.70 : 126,892.04 = 61,859.03 : x
  2. Step 2: Convert to fraction form
    91,915.70/126,892.04 = 61,859.03/x
  3. Step 3: Cross multiply
    91,915.70x = 126,892.04 × 61,859.03
  4. Step 4: Simplify right side
    91,915.70x = 7,849,417,565.37
  5. Step 5: Solve for x
    x = 7,849,417,565.37/91,915.70
  6. Step 6: Final answer
    x = 85,398.01

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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.