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Finding the Fourth Proportional to 86,622.70, 129,824.70 and 42,153.70

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Solution

The fourth proportional to 86,622.70, 129,824.70 and 42,153.70 is: 63,177.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,622.70 : 129,824.70 = 42,153.70 : x
  2. Step 2: Convert to fraction form
    86,622.70/129,824.70 = 42,153.70/x
  3. Step 3: Cross multiply
    86,622.70x = 129,824.70 × 42,153.70
  4. Step 4: Simplify right side
    86,622.70x = 5,472,591,456.39
  5. Step 5: Solve for x
    x = 5,472,591,456.39/86,622.70
  6. Step 6: Final answer
    x = 63,177.34

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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.