Home / 87,913.89-121,321.02-47,628.68

Finding the Fourth Proportional to 87,913.89, 121,321.02 and 47,628.68

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Solution

The fourth proportional to 87,913.89, 121,321.02 and 47,628.68 is: 65,727.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,913.89 : 121,321.02 = 47,628.68 : x
  2. Step 2: Convert to fraction form
    87,913.89/121,321.02 = 47,628.68/x
  3. Step 3: Cross multiply
    87,913.89x = 121,321.02 × 47,628.68
  4. Step 4: Simplify right side
    87,913.89x = 5,778,359,432.25
  5. Step 5: Solve for x
    x = 5,778,359,432.25/87,913.89
  6. Step 6: Final answer
    x = 65,727.49

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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.