Home / 91,821.80-137,502.30-60,487.40

Finding the Fourth Proportional to 91,821.80, 137,502.30 and 60,487.40

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Solution

The fourth proportional to 91,821.80, 137,502.30 and 60,487.40 is: 90,579.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,821.80 : 137,502.30 = 60,487.40 : x
  2. Step 2: Convert to fraction form
    91,821.80/137,502.30 = 60,487.40/x
  3. Step 3: Cross multiply
    91,821.80x = 137,502.30 × 60,487.40
  4. Step 4: Simplify right side
    91,821.80x = 8,317,156,621.02
  5. Step 5: Solve for x
    x = 8,317,156,621.02/91,821.80
  6. Step 6: Final answer
    x = 90,579.32

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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.