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Finding the Fourth Proportional to 87,995.42, 121,432.41 and 47,708.42

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Solution

The fourth proportional to 87,995.42, 121,432.41 and 47,708.42 is: 65,836.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,995.42 : 121,432.41 = 47,708.42 : x
  2. Step 2: Convert to fraction form
    87,995.42/121,432.41 = 47,708.42/x
  3. Step 3: Cross multiply
    87,995.42x = 121,432.41 × 47,708.42
  4. Step 4: Simplify right side
    87,995.42x = 5,793,348,417.89
  5. Step 5: Solve for x
    x = 5,793,348,417.89/87,995.42
  6. Step 6: Final answer
    x = 65,836.93

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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.