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Finding the Fourth Proportional to 153,931.20, 230,896.80 and 100,787.10

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Solution

The fourth proportional to 153,931.20, 230,896.80 and 100,787.10 is: 151,180.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,931.20 : 230,896.80 = 100,787.10 : x
  2. Step 2: Convert to fraction form
    153,931.20/230,896.80 = 100,787.10/x
  3. Step 3: Cross multiply
    153,931.20x = 230,896.80 × 100,787.10
  4. Step 4: Simplify right side
    153,931.20x = 23,271,418,871.28
  5. Step 5: Solve for x
    x = 23,271,418,871.28/153,931.20
  6. Step 6: Final answer
    x = 151,180.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.