Home / 86,456.40-129,475.60-71,555.64

Finding the Fourth Proportional to 86,456.40, 129,475.60 and 71,555.64

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Solution

The fourth proportional to 86,456.40, 129,475.60 and 71,555.64 is: 107,160.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,456.40 : 129,475.60 = 71,555.64 : x
  2. Step 2: Convert to fraction form
    86,456.40/129,475.60 = 71,555.64/x
  3. Step 3: Cross multiply
    86,456.40x = 129,475.60 × 71,555.64
  4. Step 4: Simplify right side
    86,456.40x = 9,264,709,422.38
  5. Step 5: Solve for x
    x = 9,264,709,422.38/86,456.40
  6. Step 6: Final answer
    x = 107,160.48

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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.