Home / 87,931.61-121,345.73-47,645.36

Finding the Fourth Proportional to 87,931.61, 121,345.73 and 47,645.36

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Solution

The fourth proportional to 87,931.61, 121,345.73 and 47,645.36 is: 65,750.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.61 : 121,345.73 = 47,645.36 : x
  2. Step 2: Convert to fraction form
    87,931.61/121,345.73 = 47,645.36/x
  3. Step 3: Cross multiply
    87,931.61x = 121,345.73 × 47,645.36
  4. Step 4: Simplify right side
    87,931.61x = 5,781,560,145.36
  5. Step 5: Solve for x
    x = 5,781,560,145.36/87,931.61
  6. Step 6: Final answer
    x = 65,750.65

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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.