Home / 87,931.54-121,345.64-47,645.29

Finding the Fourth Proportional to 87,931.54, 121,345.64 and 47,645.29

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Solution

The fourth proportional to 87,931.54, 121,345.64 and 47,645.29 is: 65,750.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.54 : 121,345.64 = 47,645.29 : x
  2. Step 2: Convert to fraction form
    87,931.54/121,345.64 = 47,645.29/x
  3. Step 3: Cross multiply
    87,931.54x = 121,345.64 × 47,645.29
  4. Step 4: Simplify right side
    87,931.54x = 5,781,548,208.04
  5. Step 5: Solve for x
    x = 5,781,548,208.04/87,931.54
  6. Step 6: Final answer
    x = 65,750.56

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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.