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Finding the Fourth Proportional to 201,941.04, 278,451 and 129,248.76

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Solution

The fourth proportional to 201,941.04, 278,451 and 129,248.76 is: 178,217.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,941.04 : 278,451 = 129,248.76 : x
  2. Step 2: Convert to fraction form
    201,941.04/278,451 = 129,248.76/x
  3. Step 3: Cross multiply
    201,941.04x = 278,451 × 129,248.76
  4. Step 4: Simplify right side
    201,941.04x = 35,989,446,470.76
  5. Step 5: Solve for x
    x = 35,989,446,470.76/201,941.04
  6. Step 6: Final answer
    x = 178,217.59

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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.