Home / 281,128.56-387,950.75-153,805.20

Finding the Fourth Proportional to 281,128.56, 387,950.75 and 153,805.20

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Solution

The fourth proportional to 281,128.56, 387,950.75 and 153,805.20 is: 212,247.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,128.56 : 387,950.75 = 153,805.20 : x
  2. Step 2: Convert to fraction form
    281,128.56/387,950.75 = 153,805.20/x
  3. Step 3: Cross multiply
    281,128.56x = 387,950.75 × 153,805.20
  4. Step 4: Simplify right side
    281,128.56x = 59,668,842,693.90
  5. Step 5: Solve for x
    x = 59,668,842,693.90/281,128.56
  6. Step 6: Final answer
    x = 212,247.53

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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.