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Finding the Fourth Proportional to 281,129.56, 387,952.13 and 153,806.20

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Solution

The fourth proportional to 281,129.56, 387,952.13 and 153,806.20 is: 212,248.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,129.56 : 387,952.13 = 153,806.20 : x
  2. Step 2: Convert to fraction form
    281,129.56/387,952.13 = 153,806.20/x
  3. Step 3: Cross multiply
    281,129.56x = 387,952.13 × 153,806.20
  4. Step 4: Simplify right side
    281,129.56x = 59,669,442,897.21
  5. Step 5: Solve for x
    x = 59,669,442,897.21/281,129.56
  6. Step 6: Final answer
    x = 212,248.91

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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.