Home / 87,905.38-121,309.75-47,619.05

Finding the Fourth Proportional to 87,905.38, 121,309.75 and 47,619.05

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Solution

The fourth proportional to 87,905.38, 121,309.75 and 47,619.05 is: 65,714.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,905.38 : 121,309.75 = 47,619.05 : x
  2. Step 2: Convert to fraction form
    87,905.38/121,309.75 = 47,619.05/x
  3. Step 3: Cross multiply
    87,905.38x = 121,309.75 × 47,619.05
  4. Step 4: Simplify right side
    87,905.38x = 5,776,654,235.86
  5. Step 5: Solve for x
    x = 5,776,654,235.86/87,905.38
  6. Step 6: Final answer
    x = 65,714.46

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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.