Home / 87,980.22-121,390.65-52,168.50

Finding the Fourth Proportional to 87,980.22, 121,390.65 and 52,168.50

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Solution

The fourth proportional to 87,980.22, 121,390.65 and 52,168.50 is: 71,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,980.22 : 121,390.65 = 52,168.50 : x
  2. Step 2: Convert to fraction form
    87,980.22/121,390.65 = 52,168.50/x
  3. Step 3: Cross multiply
    87,980.22x = 121,390.65 × 52,168.50
  4. Step 4: Simplify right side
    87,980.22x = 6,332,768,124.53
  5. Step 5: Solve for x
    x = 6,332,768,124.53/87,980.22
  6. Step 6: Final answer
    x = 71,979.45

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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.