Home / 86,811.10-129,871.05-75,252.70

Finding the Fourth Proportional to 86,811.10, 129,871.05 and 75,252.70

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Solution

The fourth proportional to 86,811.10, 129,871.05 and 75,252.70 is: 112,579.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,811.10 : 129,871.05 = 75,252.70 : x
  2. Step 2: Convert to fraction form
    86,811.10/129,871.05 = 75,252.70/x
  3. Step 3: Cross multiply
    86,811.10x = 129,871.05 × 75,252.70
  4. Step 4: Simplify right side
    86,811.10x = 9,773,147,164.34
  5. Step 5: Solve for x
    x = 9,773,147,164.34/86,811.10
  6. Step 6: Final answer
    x = 112,579.46

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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.