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Finding the Fourth Proportional to 158,963.88, 219,383.52 and 87,358.20

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Solution

The fourth proportional to 158,963.88, 219,383.52 and 87,358.20 is: 120,561.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,963.88 : 219,383.52 = 87,358.20 : x
  2. Step 2: Convert to fraction form
    158,963.88/219,383.52 = 87,358.20/x
  3. Step 3: Cross multiply
    158,963.88x = 219,383.52 × 87,358.20
  4. Step 4: Simplify right side
    158,963.88x = 19,164,949,416.86
  5. Step 5: Solve for x
    x = 19,164,949,416.86/158,963.88
  6. Step 6: Final answer
    x = 120,561.66

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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.