Home / 78,666.20-108,559.16-42,856.50

Finding the Fourth Proportional to 78,666.20, 108,559.16 and 42,856.50

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Solution

The fourth proportional to 78,666.20, 108,559.16 and 42,856.50 is: 59,141.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,666.20 : 108,559.16 = 42,856.50 : x
  2. Step 2: Convert to fraction form
    78,666.20/108,559.16 = 42,856.50/x
  3. Step 3: Cross multiply
    78,666.20x = 108,559.16 × 42,856.50
  4. Step 4: Simplify right side
    78,666.20x = 4,652,465,640.54
  5. Step 5: Solve for x
    x = 4,652,465,640.54/78,666.20
  6. Step 6: Final answer
    x = 59,141.86

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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.