Home / 91,444.80-137,167.20-90,861.60

Finding the Fourth Proportional to 91,444.80, 137,167.20 and 90,861.60

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Solution

The fourth proportional to 91,444.80, 137,167.20 and 90,861.60 is: 136,292.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,444.80 : 137,167.20 = 90,861.60 : x
  2. Step 2: Convert to fraction form
    91,444.80/137,167.20 = 90,861.60/x
  3. Step 3: Cross multiply
    91,444.80x = 137,167.20 × 90,861.60
  4. Step 4: Simplify right side
    91,444.80x = 12,463,231,259.52
  5. Step 5: Solve for x
    x = 12,463,231,259.52/91,444.80
  6. Step 6: Final answer
    x = 136,292.40

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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.