Home / 91,611.20-137,360.64-38,990.72

Finding the Fourth Proportional to 91,611.20, 137,360.64 and 38,990.72

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Solution

The fourth proportional to 91,611.20, 137,360.64 and 38,990.72 is: 58,462.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,611.20 : 137,360.64 = 38,990.72 : x
  2. Step 2: Convert to fraction form
    91,611.20/137,360.64 = 38,990.72/x
  3. Step 3: Cross multiply
    91,611.20x = 137,360.64 × 38,990.72
  4. Step 4: Simplify right side
    91,611.20x = 5,355,790,253.26
  5. Step 5: Solve for x
    x = 5,355,790,253.26/91,611.20
  6. Step 6: Final answer
    x = 58,462.18

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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.