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Finding the Fourth Proportional to 81,294.84, 121,943.28 and 28,667.42

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Solution

The fourth proportional to 81,294.84, 121,943.28 and 28,667.42 is: 43,001.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,294.84 : 121,943.28 = 28,667.42 : x
  2. Step 2: Convert to fraction form
    81,294.84/121,943.28 = 28,667.42/x
  3. Step 3: Cross multiply
    81,294.84x = 121,943.28 × 28,667.42
  4. Step 4: Simplify right side
    81,294.84x = 3,495,799,223.94
  5. Step 5: Solve for x
    x = 3,495,799,223.94/81,294.84
  6. Step 6: Final answer
    x = 43,001.49

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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.