Home / 123,207.28-170,052.40-77,856.40

Finding the Fourth Proportional to 123,207.28, 170,052.40 and 77,856.40

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Solution

The fourth proportional to 123,207.28, 170,052.40 and 77,856.40 is: 107,458.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,207.28 : 170,052.40 = 77,856.40 : x
  2. Step 2: Convert to fraction form
    123,207.28/170,052.40 = 77,856.40/x
  3. Step 3: Cross multiply
    123,207.28x = 170,052.40 × 77,856.40
  4. Step 4: Simplify right side
    123,207.28x = 13,239,667,675.36
  5. Step 5: Solve for x
    x = 13,239,667,675.36/123,207.28
  6. Step 6: Final answer
    x = 107,458.49

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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.