Home / 281,120.65-387,973.20-153,815.38

Finding the Fourth Proportional to 281,120.65, 387,973.20 and 153,815.38

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Solution

The fourth proportional to 281,120.65, 387,973.20 and 153,815.38 is: 212,279.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,120.65 : 387,973.20 = 153,815.38 : x
  2. Step 2: Convert to fraction form
    281,120.65/387,973.20 = 153,815.38/x
  3. Step 3: Cross multiply
    281,120.65x = 387,973.20 × 153,815.38
  4. Step 4: Simplify right side
    281,120.65x = 59,676,245,187.82
  5. Step 5: Solve for x
    x = 59,676,245,187.82/281,120.65
  6. Step 6: Final answer
    x = 212,279.83

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1.5x scale

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.