Home / 112,811.90-155,660.68-64,391.72

Finding the Fourth Proportional to 112,811.90, 155,660.68 and 64,391.72

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Solution

The fourth proportional to 112,811.90, 155,660.68 and 64,391.72 is: 88,849.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,811.90 : 155,660.68 = 64,391.72 : x
  2. Step 2: Convert to fraction form
    112,811.90/155,660.68 = 64,391.72/x
  3. Step 3: Cross multiply
    112,811.90x = 155,660.68 × 64,391.72
  4. Step 4: Simplify right side
    112,811.90x = 10,023,258,921.57
  5. Step 5: Solve for x
    x = 10,023,258,921.57/112,811.90
  6. Step 6: Final answer
    x = 88,849.31

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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.