Home / 78,947.28-108,914.40-51,715.62

Finding the Fourth Proportional to 78,947.28, 108,914.40 and 51,715.62

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Solution

The fourth proportional to 78,947.28, 108,914.40 and 51,715.62 is: 71,346.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,947.28 : 108,914.40 = 51,715.62 : x
  2. Step 2: Convert to fraction form
    78,947.28/108,914.40 = 51,715.62/x
  3. Step 3: Cross multiply
    78,947.28x = 108,914.40 × 51,715.62
  4. Step 4: Simplify right side
    78,947.28x = 5,632,575,722.93
  5. Step 5: Solve for x
    x = 5,632,575,722.93/78,947.28
  6. Step 6: Final answer
    x = 71,346.04

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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.