Home / 91,459.15-137,874.23-85,362.89

Finding the Fourth Proportional to 91,459.15, 137,874.23 and 85,362.89

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Solution

The fourth proportional to 91,459.15, 137,874.23 and 85,362.89 is: 128,684.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,459.15 : 137,874.23 = 85,362.89 : x
  2. Step 2: Convert to fraction form
    91,459.15/137,874.23 = 85,362.89/x
  3. Step 3: Cross multiply
    91,459.15x = 137,874.23 × 85,362.89
  4. Step 4: Simplify right side
    91,459.15x = 11,769,341,613.14
  5. Step 5: Solve for x
    x = 11,769,341,613.14/91,459.15
  6. Step 6: Final answer
    x = 128,684.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.