Home / 87,935.12-121,243.56-61,099.92

Finding the Fourth Proportional to 87,935.12, 121,243.56 and 61,099.92

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Solution

The fourth proportional to 87,935.12, 121,243.56 and 61,099.92 is: 84,243.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,935.12 : 121,243.56 = 61,099.92 : x
  2. Step 2: Convert to fraction form
    87,935.12/121,243.56 = 61,099.92/x
  3. Step 3: Cross multiply
    87,935.12x = 121,243.56 × 61,099.92
  4. Step 4: Simplify right side
    87,935.12x = 7,407,971,816.52
  5. Step 5: Solve for x
    x = 7,407,971,816.52/87,935.12
  6. Step 6: Final answer
    x = 84,243.61

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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.