Home / 87,818.91-131,728.71-21,258.93

Finding the Fourth Proportional to 87,818.91, 131,728.71 and 21,258.93

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Solution

The fourth proportional to 87,818.91, 131,728.71 and 21,258.93 is: 31,888.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,818.91 : 131,728.71 = 21,258.93 : x
  2. Step 2: Convert to fraction form
    87,818.91/131,728.71 = 21,258.93/x
  3. Step 3: Cross multiply
    87,818.91x = 131,728.71 × 21,258.93
  4. Step 4: Simplify right side
    87,818.91x = 2,800,411,424.88
  5. Step 5: Solve for x
    x = 2,800,411,424.88/87,818.91
  6. Step 6: Final answer
    x = 31,888.48

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1.5x scale

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.