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Finding the Fourth Proportional to 81,717.52, 112,775.00 and 61,538.80

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Solution

The fourth proportional to 81,717.52, 112,775.00 and 61,538.80 is: 84,927.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,717.52 : 112,775.00 = 61,538.80 : x
  2. Step 2: Convert to fraction form
    81,717.52/112,775.00 = 61,538.80/x
  3. Step 3: Cross multiply
    81,717.52x = 112,775.00 × 61,538.80
  4. Step 4: Simplify right side
    81,717.52x = 6,940,037,298.43
  5. Step 5: Solve for x
    x = 6,940,037,298.43/81,717.52
  6. Step 6: Final answer
    x = 84,927.17

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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.