Home / 92,311.50-137,742.70-86,669.04

Finding the Fourth Proportional to 92,311.50, 137,742.70 and 86,669.04

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Solution

The fourth proportional to 92,311.50, 137,742.70 and 86,669.04 is: 129,323.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,311.50 : 137,742.70 = 86,669.04 : x
  2. Step 2: Convert to fraction form
    92,311.50/137,742.70 = 86,669.04/x
  3. Step 3: Cross multiply
    92,311.50x = 137,742.70 × 86,669.04
  4. Step 4: Simplify right side
    92,311.50x = 11,938,027,359.34
  5. Step 5: Solve for x
    x = 11,938,027,359.34/92,311.50
  6. Step 6: Final answer
    x = 129,323.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.