Home / 160,815.67-221,780.40-100,391.90

Finding the Fourth Proportional to 160,815.67, 221,780.40 and 100,391.90

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Solution

The fourth proportional to 160,815.67, 221,780.40 and 100,391.90 is: 138,450.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,815.67 : 221,780.40 = 100,391.90 : x
  2. Step 2: Convert to fraction form
    160,815.67/221,780.40 = 100,391.90/x
  3. Step 3: Cross multiply
    160,815.67x = 221,780.40 × 100,391.90
  4. Step 4: Simplify right side
    160,815.67x = 22,264,955,738.76
  5. Step 5: Solve for x
    x = 22,264,955,738.76/160,815.67
  6. Step 6: Final answer
    x = 138,450.16

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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.