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Finding the Fourth Proportional to 72,966.71, 109,340.91 and 66,054.17

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Solution

The fourth proportional to 72,966.71, 109,340.91 and 66,054.17 is: 98,982.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,966.71 : 109,340.91 = 66,054.17 : x
  2. Step 2: Convert to fraction form
    72,966.71/109,340.91 = 66,054.17/x
  3. Step 3: Cross multiply
    72,966.71x = 109,340.91 × 66,054.17
  4. Step 4: Simplify right side
    72,966.71x = 7,222,422,510.39
  5. Step 5: Solve for x
    x = 7,222,422,510.39/72,966.71
  6. Step 6: Final answer
    x = 98,982.44

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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.