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Finding the Fourth Proportional to 147,630.40, 221,294.40 and 72,635.20

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Solution

The fourth proportional to 147,630.40, 221,294.40 and 72,635.20 is: 108,878.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,630.40 : 221,294.40 = 72,635.20 : x
  2. Step 2: Convert to fraction form
    147,630.40/221,294.40 = 72,635.20/x
  3. Step 3: Cross multiply
    147,630.40x = 221,294.40 × 72,635.20
  4. Step 4: Simplify right side
    147,630.40x = 16,073,763,002.88
  5. Step 5: Solve for x
    x = 16,073,763,002.88/147,630.40
  6. Step 6: Final answer
    x = 108,878.41

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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.