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Finding the Fourth Proportional to 147,905.60, 221,728.80 and 88,678.40

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Solution

The fourth proportional to 147,905.60, 221,728.80 and 88,678.40 is: 132,939.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,905.60 : 221,728.80 = 88,678.40 : x
  2. Step 2: Convert to fraction form
    147,905.60/221,728.80 = 88,678.40/x
  3. Step 3: Cross multiply
    147,905.60x = 221,728.80 × 88,678.40
  4. Step 4: Simplify right side
    147,905.60x = 19,662,555,217.92
  5. Step 5: Solve for x
    x = 19,662,555,217.92/147,905.60
  6. Step 6: Final answer
    x = 132,939.90

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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.