Home / 78,432.20-117,518.70-66,768.20

Finding the Fourth Proportional to 78,432.20, 117,518.70 and 66,768.20

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Solution

The fourth proportional to 78,432.20, 117,518.70 and 66,768.20 is: 100,041.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.20 : 117,518.70 = 66,768.20 : x
  2. Step 2: Convert to fraction form
    78,432.20/117,518.70 = 66,768.20/x
  3. Step 3: Cross multiply
    78,432.20x = 117,518.70 × 66,768.20
  4. Step 4: Simplify right side
    78,432.20x = 7,846,512,065.34
  5. Step 5: Solve for x
    x = 7,846,512,065.34/78,432.20
  6. Step 6: Final answer
    x = 100,041.97

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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.