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Finding the Fourth Proportional to 86,159.72, 129,260.28 and 29,991.56

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Solution

The fourth proportional to 86,159.72, 129,260.28 and 29,991.56 is: 44,994.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,159.72 : 129,260.28 = 29,991.56 : x
  2. Step 2: Convert to fraction form
    86,159.72/129,260.28 = 29,991.56/x
  3. Step 3: Cross multiply
    86,159.72x = 129,260.28 × 29,991.56
  4. Step 4: Simplify right side
    86,159.72x = 3,876,717,443.24
  5. Step 5: Solve for x
    x = 3,876,717,443.24/86,159.72
  6. Step 6: Final answer
    x = 44,994.55

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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.