Home / 87,931.80-121,346.37-47,645.60

Finding the Fourth Proportional to 87,931.80, 121,346.37 and 47,645.60

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Solution

The fourth proportional to 87,931.80, 121,346.37 and 47,645.60 is: 65,751.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.80 : 121,346.37 = 47,645.60 : x
  2. Step 2: Convert to fraction form
    87,931.80/121,346.37 = 47,645.60/x
  3. Step 3: Cross multiply
    87,931.80x = 121,346.37 × 47,645.60
  4. Step 4: Simplify right side
    87,931.80x = 5,781,619,999.74
  5. Step 5: Solve for x
    x = 5,781,619,999.74/87,931.80
  6. Step 6: Final answer
    x = 65,751.18

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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.