Home / 120,856.33-166,801.71-100,681.26

Finding the Fourth Proportional to 120,856.33, 166,801.71 and 100,681.26

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Solution

The fourth proportional to 120,856.33, 166,801.71 and 100,681.26 is: 138,956.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,856.33 : 166,801.71 = 100,681.26 : x
  2. Step 2: Convert to fraction form
    120,856.33/166,801.71 = 100,681.26/x
  3. Step 3: Cross multiply
    120,856.33x = 166,801.71 × 100,681.26
  4. Step 4: Simplify right side
    120,856.33x = 16,793,806,332.95
  5. Step 5: Solve for x
    x = 16,793,806,332.95/120,856.33
  6. Step 6: Final answer
    x = 138,956.78

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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.