Home / 86,815.60-129,877.80-75,257.20

Finding the Fourth Proportional to 86,815.60, 129,877.80 and 75,257.20

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Solution

The fourth proportional to 86,815.60, 129,877.80 and 75,257.20 is: 112,586.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,815.60 : 129,877.80 = 75,257.20 : x
  2. Step 2: Convert to fraction form
    86,815.60/129,877.80 = 75,257.20/x
  3. Step 3: Cross multiply
    86,815.60x = 129,877.80 × 75,257.20
  4. Step 4: Simplify right side
    86,815.60x = 9,774,239,570.16
  5. Step 5: Solve for x
    x = 9,774,239,570.16/86,815.60
  6. Step 6: Final answer
    x = 112,586.21

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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.