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Finding the Fourth Proportional to 86,555.58, 129,833.37 and 20,891.58

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Solution

The fourth proportional to 86,555.58, 129,833.37 and 20,891.58 is: 31,337.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,555.58 : 129,833.37 = 20,891.58 : x
  2. Step 2: Convert to fraction form
    86,555.58/129,833.37 = 20,891.58/x
  3. Step 3: Cross multiply
    86,555.58x = 129,833.37 × 20,891.58
  4. Step 4: Simplify right side
    86,555.58x = 2,712,424,236.02
  5. Step 5: Solve for x
    x = 2,712,424,236.02/86,555.58
  6. Step 6: Final answer
    x = 31,337.37

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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.