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Finding the Fourth Proportional to 81,760.88, 112,915.68 and 56,333.36

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Solution

The fourth proportional to 81,760.88, 112,915.68 and 56,333.36 is: 77,799.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,760.88 : 112,915.68 = 56,333.36 : x
  2. Step 2: Convert to fraction form
    81,760.88/112,915.68 = 56,333.36/x
  3. Step 3: Cross multiply
    81,760.88x = 112,915.68 × 56,333.36
  4. Step 4: Simplify right side
    81,760.88x = 6,360,919,651.08
  5. Step 5: Solve for x
    x = 6,360,919,651.08/81,760.88
  6. Step 6: Final answer
    x = 77,799.06

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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.