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Finding the Fourth Proportional to 84,708.89, 126,980.71 and 40,323.72

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Solution

The fourth proportional to 84,708.89, 126,980.71 and 40,323.72 is: 60,446.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,708.89 : 126,980.71 = 40,323.72 : x
  2. Step 2: Convert to fraction form
    84,708.89/126,980.71 = 40,323.72/x
  3. Step 3: Cross multiply
    84,708.89x = 126,980.71 × 40,323.72
  4. Step 4: Simplify right side
    84,708.89x = 5,120,335,197.63
  5. Step 5: Solve for x
    x = 5,120,335,197.63/84,708.89
  6. Step 6: Final answer
    x = 60,446.26

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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.