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Finding the Fourth Proportional to 147,425.80, 221,209.80 and 72,505.30

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Solution

The fourth proportional to 147,425.80, 221,209.80 and 72,505.30 is: 108,792.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,425.80 : 221,209.80 = 72,505.30 : x
  2. Step 2: Convert to fraction form
    147,425.80/221,209.80 = 72,505.30/x
  3. Step 3: Cross multiply
    147,425.80x = 221,209.80 × 72,505.30
  4. Step 4: Simplify right side
    147,425.80x = 16,038,882,911.94
  5. Step 5: Solve for x
    x = 16,038,882,911.94/147,425.80
  6. Step 6: Final answer
    x = 108,792.92

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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.