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Finding the Fourth Proportional to 281,044.48, 387,838.56 and 153,722.56

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Solution

The fourth proportional to 281,044.48, 387,838.56 and 153,722.56 is: 212,135.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,044.48 : 387,838.56 = 153,722.56 : x
  2. Step 2: Convert to fraction form
    281,044.48/387,838.56 = 153,722.56/x
  3. Step 3: Cross multiply
    281,044.48x = 387,838.56 × 153,722.56
  4. Step 4: Simplify right side
    281,044.48x = 59,619,536,309.91
  5. Step 5: Solve for x
    x = 59,619,536,309.91/281,044.48
  6. Step 6: Final answer
    x = 212,135.59

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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.