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Finding the Fourth Proportional to 147,905.40, 221,706.90 and 72,910.20

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Solution

The fourth proportional to 147,905.40, 221,706.90 and 72,910.20 is: 109,290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,905.40 : 221,706.90 = 72,910.20 : x
  2. Step 2: Convert to fraction form
    147,905.40/221,706.90 = 72,910.20/x
  3. Step 3: Cross multiply
    147,905.40x = 221,706.90 × 72,910.20
  4. Step 4: Simplify right side
    147,905.40x = 16,164,694,420.38
  5. Step 5: Solve for x
    x = 16,164,694,420.38/147,905.40
  6. Step 6: Final answer
    x = 109,290.77

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1.5x scale

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.