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Finding the Fourth Proportional to 91,216.16, 125,964.92 and 86,246.20

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Solution

The fourth proportional to 91,216.16, 125,964.92 and 86,246.20 is: 119,101.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,216.16 : 125,964.92 = 86,246.20 : x
  2. Step 2: Convert to fraction form
    91,216.16/125,964.92 = 86,246.20/x
  3. Step 3: Cross multiply
    91,216.16x = 125,964.92 × 86,246.20
  4. Step 4: Simplify right side
    91,216.16x = 10,863,996,056.38
  5. Step 5: Solve for x
    x = 10,863,996,056.38/91,216.16
  6. Step 6: Final answer
    x = 119,101.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.