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Finding the Fourth Proportional to 91,851.30, 137,776.95 and 80,187.30

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Solution

The fourth proportional to 91,851.30, 137,776.95 and 80,187.30 is: 120,280.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,851.30 : 137,776.95 = 80,187.30 : x
  2. Step 2: Convert to fraction form
    91,851.30/137,776.95 = 80,187.30/x
  3. Step 3: Cross multiply
    91,851.30x = 137,776.95 × 80,187.30
  4. Step 4: Simplify right side
    91,851.30x = 11,047,961,622.74
  5. Step 5: Solve for x
    x = 11,047,961,622.74/91,851.30
  6. Step 6: Final answer
    x = 120,280.95

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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.