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Finding the Fourth Proportional to 131,472.70, 197,209.05 and 90,000.70

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Solution

The fourth proportional to 131,472.70, 197,209.05 and 90,000.70 is: 135,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,472.70 : 197,209.05 = 90,000.70 : x
  2. Step 2: Convert to fraction form
    131,472.70/197,209.05 = 90,000.70/x
  3. Step 3: Cross multiply
    131,472.70x = 197,209.05 × 90,000.70
  4. Step 4: Simplify right side
    131,472.70x = 17,748,952,546.34
  5. Step 5: Solve for x
    x = 17,748,952,546.34/131,472.70
  6. Step 6: Final answer
    x = 135,001.05

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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.