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Finding the Fourth Proportional to 91,122.80, 136,684.20 and 82,812.20

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Solution

The fourth proportional to 91,122.80, 136,684.20 and 82,812.20 is: 124,218.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,122.80 : 136,684.20 = 82,812.20 : x
  2. Step 2: Convert to fraction form
    91,122.80/136,684.20 = 82,812.20/x
  3. Step 3: Cross multiply
    91,122.80x = 136,684.20 × 82,812.20
  4. Step 4: Simplify right side
    91,122.80x = 11,319,119,307.24
  5. Step 5: Solve for x
    x = 11,319,119,307.24/91,122.80
  6. Step 6: Final answer
    x = 124,218.30

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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.