Home / 91,220.55-137,125.04-84,587.78

Finding the Fourth Proportional to 91,220.55, 137,125.04 and 84,587.78

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Solution

The fourth proportional to 91,220.55, 137,125.04 and 84,587.78 is: 127,154.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,220.55 : 137,125.04 = 84,587.78 : x
  2. Step 2: Convert to fraction form
    91,220.55/137,125.04 = 84,587.78/x
  3. Step 3: Cross multiply
    91,220.55x = 137,125.04 × 84,587.78
  4. Step 4: Simplify right side
    91,220.55x = 11,599,101,607.45
  5. Step 5: Solve for x
    x = 11,599,101,607.45/91,220.55
  6. Step 6: Final answer
    x = 127,154.48

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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.