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Finding the Fourth Proportional to 81,602.06, 121,724.95 and 80,248.74

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Solution

The fourth proportional to 81,602.06, 121,724.95 and 80,248.74 is: 119,706.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,602.06 : 121,724.95 = 80,248.74 : x
  2. Step 2: Convert to fraction form
    81,602.06/121,724.95 = 80,248.74/x
  3. Step 3: Cross multiply
    81,602.06x = 121,724.95 × 80,248.74
  4. Step 4: Simplify right side
    81,602.06x = 9,768,273,462.82
  5. Step 5: Solve for x
    x = 9,768,273,462.82/81,602.06
  6. Step 6: Final answer
    x = 119,706.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.