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Finding the Fourth Proportional to 83,274.60, 124,911.90 and 81,330.60

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Solution

The fourth proportional to 83,274.60, 124,911.90 and 81,330.60 is: 121,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,274.60 : 124,911.90 = 81,330.60 : x
  2. Step 2: Convert to fraction form
    83,274.60/124,911.90 = 81,330.60/x
  3. Step 3: Cross multiply
    83,274.60x = 124,911.90 × 81,330.60
  4. Step 4: Simplify right side
    83,274.60x = 10,159,159,774.14
  5. Step 5: Solve for x
    x = 10,159,159,774.14/83,274.60
  6. Step 6: Final answer
    x = 121,995.90

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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.