Home / 78,983.68-117,971.12-71,475.60

Finding the Fourth Proportional to 78,983.68, 117,971.12 and 71,475.60

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Solution

The fourth proportional to 78,983.68, 117,971.12 and 71,475.60 is: 106,756.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,983.68 : 117,971.12 = 71,475.60 : x
  2. Step 2: Convert to fraction form
    78,983.68/117,971.12 = 71,475.60/x
  3. Step 3: Cross multiply
    78,983.68x = 117,971.12 × 71,475.60
  4. Step 4: Simplify right side
    78,983.68x = 8,432,056,584.67
  5. Step 5: Solve for x
    x = 8,432,056,584.67/78,983.68
  6. Step 6: Final answer
    x = 106,756.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.