Home / 87,987.57-121,288.47-53,932.95

Finding the Fourth Proportional to 87,987.57, 121,288.47 and 53,932.95

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Solution

The fourth proportional to 87,987.57, 121,288.47 and 53,932.95 is: 74,345.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.57 : 121,288.47 = 53,932.95 : x
  2. Step 2: Convert to fraction form
    87,987.57/121,288.47 = 53,932.95/x
  3. Step 3: Cross multiply
    87,987.57x = 121,288.47 × 53,932.95
  4. Step 4: Simplify right side
    87,987.57x = 6,541,444,988.09
  5. Step 5: Solve for x
    x = 6,541,444,988.09/87,987.57
  6. Step 6: Final answer
    x = 74,345.10

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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.