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Finding the Fourth Proportional to 81,685.35, 122,549.88 and 73,877.76

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Solution

The fourth proportional to 81,685.35, 122,549.88 and 73,877.76 is: 110,836.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,685.35 : 122,549.88 = 73,877.76 : x
  2. Step 2: Convert to fraction form
    81,685.35/122,549.88 = 73,877.76/x
  3. Step 3: Cross multiply
    81,685.35x = 122,549.88 × 73,877.76
  4. Step 4: Simplify right side
    81,685.35x = 9,053,710,622.67
  5. Step 5: Solve for x
    x = 9,053,710,622.67/81,685.35
  6. Step 6: Final answer
    x = 110,836.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.