Home / 83,686.23-115,331.23-56,829.87

Finding the Fourth Proportional to 83,686.23, 115,331.23 and 56,829.87

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Solution

The fourth proportional to 83,686.23, 115,331.23 and 56,829.87 is: 78,319.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,686.23 : 115,331.23 = 56,829.87 : x
  2. Step 2: Convert to fraction form
    83,686.23/115,331.23 = 56,829.87/x
  3. Step 3: Cross multiply
    83,686.23x = 115,331.23 × 56,829.87
  4. Step 4: Simplify right side
    83,686.23x = 6,554,257,947.03
  5. Step 5: Solve for x
    x = 6,554,257,947.03/83,686.23
  6. Step 6: Final answer
    x = 78,319.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.