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Finding the Fourth Proportional to 158,787.32, 219,125.64 and 87,168.56

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Solution

The fourth proportional to 158,787.32, 219,125.64 and 87,168.56 is: 120,292.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,787.32 : 219,125.64 = 87,168.56 : x
  2. Step 2: Convert to fraction form
    158,787.32/219,125.64 = 87,168.56/x
  3. Step 3: Cross multiply
    158,787.32x = 219,125.64 × 87,168.56
  4. Step 4: Simplify right side
    158,787.32x = 19,100,866,497.88
  5. Step 5: Solve for x
    x = 19,100,866,497.88/158,787.32
  6. Step 6: Final answer
    x = 120,292.14

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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.