Home / 87,931.86-121,351.92-49,678.14

Finding the Fourth Proportional to 87,931.86, 121,351.92 and 49,678.14

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Solution

The fourth proportional to 87,931.86, 121,351.92 and 49,678.14 is: 68,559.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.86 : 121,351.92 = 49,678.14 : x
  2. Step 2: Convert to fraction form
    87,931.86/121,351.92 = 49,678.14/x
  3. Step 3: Cross multiply
    87,931.86x = 121,351.92 × 49,678.14
  4. Step 4: Simplify right side
    87,931.86x = 6,028,537,671.03
  5. Step 5: Solve for x
    x = 6,028,537,671.03/87,931.86
  6. Step 6: Final answer
    x = 68,559.20

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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.