Home / 100,445.28-150,667.92-78,275.25

Finding the Fourth Proportional to 100,445.28, 150,667.92 and 78,275.25

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Solution

The fourth proportional to 100,445.28, 150,667.92 and 78,275.25 is: 117,412.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,445.28 : 150,667.92 = 78,275.25 : x
  2. Step 2: Convert to fraction form
    100,445.28/150,667.92 = 78,275.25/x
  3. Step 3: Cross multiply
    100,445.28x = 150,667.92 × 78,275.25
  4. Step 4: Simplify right side
    100,445.28x = 11,793,567,960.26
  5. Step 5: Solve for x
    x = 11,793,567,960.26/100,445.28
  6. Step 6: Final answer
    x = 117,412.87

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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.