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Finding the Fourth Proportional to 87,589.71, 120,873.80 and 47,303.48

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Solution

The fourth proportional to 87,589.71, 120,873.80 and 47,303.48 is: 65,278.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,589.71 : 120,873.80 = 47,303.48 : x
  2. Step 2: Convert to fraction form
    87,589.71/120,873.80 = 47,303.48/x
  3. Step 3: Cross multiply
    87,589.71x = 120,873.80 × 47,303.48
  4. Step 4: Simplify right side
    87,589.71x = 5,717,751,801.27
  5. Step 5: Solve for x
    x = 5,717,751,801.27/87,589.71
  6. Step 6: Final answer
    x = 65,278.81

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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.