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Finding the Fourth Proportional to 81,308.78, 121,963.19 and 53,600.30

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Solution

The fourth proportional to 81,308.78, 121,963.19 and 53,600.30 is: 80,400.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,308.78 : 121,963.19 = 53,600.30 : x
  2. Step 2: Convert to fraction form
    81,308.78/121,963.19 = 53,600.30/x
  3. Step 3: Cross multiply
    81,308.78x = 121,963.19 × 53,600.30
  4. Step 4: Simplify right side
    81,308.78x = 6,537,263,572.96
  5. Step 5: Solve for x
    x = 6,537,263,572.96/81,308.78
  6. Step 6: Final answer
    x = 80,400.46

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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.