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Finding the Fourth Proportional to 106,331.20, 159,496.80 and 86,648.20

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Solution

The fourth proportional to 106,331.20, 159,496.80 and 86,648.20 is: 129,972.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,331.20 : 159,496.80 = 86,648.20 : x
  2. Step 2: Convert to fraction form
    106,331.20/159,496.80 = 86,648.20/x
  3. Step 3: Cross multiply
    106,331.20x = 159,496.80 × 86,648.20
  4. Step 4: Simplify right side
    106,331.20x = 13,820,110,625.76
  5. Step 5: Solve for x
    x = 13,820,110,625.76/106,331.20
  6. Step 6: Final answer
    x = 129,972.30

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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.