Home / 120,212.28-165,837.08-77,784.48

Finding the Fourth Proportional to 120,212.28, 165,837.08 and 77,784.48

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Solution

The fourth proportional to 120,212.28, 165,837.08 and 77,784.48 is: 107,306.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,212.28 : 165,837.08 = 77,784.48 : x
  2. Step 2: Convert to fraction form
    120,212.28/165,837.08 = 77,784.48/x
  3. Step 3: Cross multiply
    120,212.28x = 165,837.08 × 77,784.48
  4. Step 4: Simplify right side
    120,212.28x = 12,899,551,032.52
  5. Step 5: Solve for x
    x = 12,899,551,032.52/120,212.28
  6. Step 6: Final answer
    x = 107,306.43

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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.