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Finding the Fourth Proportional to 147,701.40, 221,400.90 and 72,706.20

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Solution

The fourth proportional to 147,701.40, 221,400.90 and 72,706.20 is: 108,984.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,701.40 : 221,400.90 = 72,706.20 : x
  2. Step 2: Convert to fraction form
    147,701.40/221,400.90 = 72,706.20/x
  3. Step 3: Cross multiply
    147,701.40x = 221,400.90 × 72,706.20
  4. Step 4: Simplify right side
    147,701.40x = 16,097,218,115.58
  5. Step 5: Solve for x
    x = 16,097,218,115.58/147,701.40
  6. Step 6: Final answer
    x = 108,984.87

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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.