Home / 120,717.16-166,489.05-90,569.32

Finding the Fourth Proportional to 120,717.16, 166,489.05 and 90,569.32

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Solution

The fourth proportional to 120,717.16, 166,489.05 and 90,569.32 is: 124,910.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,717.16 : 166,489.05 = 90,569.32 : x
  2. Step 2: Convert to fraction form
    120,717.16/166,489.05 = 90,569.32/x
  3. Step 3: Cross multiply
    120,717.16x = 166,489.05 × 90,569.32
  4. Step 4: Simplify right side
    120,717.16x = 15,078,800,045.95
  5. Step 5: Solve for x
    x = 15,078,800,045.95/120,717.16
  6. Step 6: Final answer
    x = 124,910.16

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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.