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Finding the Fourth Proportional to 281,254.59, 388,129.05 and 153,929.88

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Solution

The fourth proportional to 281,254.59, 388,129.05 and 153,929.88 is: 212,421.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,254.59 : 388,129.05 = 153,929.88 : x
  2. Step 2: Convert to fraction form
    281,254.59/388,129.05 = 153,929.88/x
  3. Step 3: Cross multiply
    281,254.59x = 388,129.05 × 153,929.88
  4. Step 4: Simplify right side
    281,254.59x = 59,744,658,091.01
  5. Step 5: Solve for x
    x = 59,744,658,091.01/281,254.59
  6. Step 6: Final answer
    x = 212,421.98

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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.