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Finding the Fourth Proportional to 147,908.60, 221,862.90 and 91,921.40

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Solution

The fourth proportional to 147,908.60, 221,862.90 and 91,921.40 is: 137,882.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,908.60 : 221,862.90 = 91,921.40 : x
  2. Step 2: Convert to fraction form
    147,908.60/221,862.90 = 91,921.40/x
  3. Step 3: Cross multiply
    147,908.60x = 221,862.90 × 91,921.40
  4. Step 4: Simplify right side
    147,908.60x = 20,393,948,376.06
  5. Step 5: Solve for x
    x = 20,393,948,376.06/147,908.60
  6. Step 6: Final answer
    x = 137,882.10

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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.