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Finding the Fourth Proportional to 281,018.55, 387,808.65 and 153,691.41

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Solution

The fourth proportional to 281,018.55, 387,808.65 and 153,691.41 is: 212,095.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,018.55 : 387,808.65 = 153,691.41 : x
  2. Step 2: Convert to fraction form
    281,018.55/387,808.65 = 153,691.41/x
  3. Step 3: Cross multiply
    281,018.55x = 387,808.65 × 153,691.41
  4. Step 4: Simplify right side
    281,018.55x = 59,602,858,228.70
  5. Step 5: Solve for x
    x = 59,602,858,228.70/281,018.55
  6. Step 6: Final answer
    x = 212,095.81

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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.