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Finding the Fourth Proportional to 81,817.59, 112,859.28 and 49,931.13

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Solution

The fourth proportional to 81,817.59, 112,859.28 and 49,931.13 is: 68,875.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,817.59 : 112,859.28 = 49,931.13 : x
  2. Step 2: Convert to fraction form
    81,817.59/112,859.28 = 49,931.13/x
  3. Step 3: Cross multiply
    81,817.59x = 112,859.28 × 49,931.13
  4. Step 4: Simplify right side
    81,817.59x = 5,635,191,381.39
  5. Step 5: Solve for x
    x = 5,635,191,381.39/81,817.59
  6. Step 6: Final answer
    x = 68,875.06

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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.