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Finding the Fourth Proportional to 281,256.59, 388,131.81 and 153,931.88

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Solution

The fourth proportional to 281,256.59, 388,131.81 and 153,931.88 is: 212,424.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,256.59 : 388,131.81 = 153,931.88 : x
  2. Step 2: Convert to fraction form
    281,256.59/388,131.81 = 153,931.88/x
  3. Step 3: Cross multiply
    281,256.59x = 388,131.81 × 153,931.88
  4. Step 4: Simplify right side
    281,256.59x = 59,745,859,201.10
  5. Step 5: Solve for x
    x = 59,745,859,201.10/281,256.59
  6. Step 6: Final answer
    x = 212,424.74

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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.