Home / 78,984.68-117,972.61-71,476.60

Finding the Fourth Proportional to 78,984.68, 117,972.61 and 71,476.60

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Solution

The fourth proportional to 78,984.68, 117,972.61 and 71,476.60 is: 106,758.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,984.68 : 117,972.61 = 71,476.60 : x
  2. Step 2: Convert to fraction form
    78,984.68/117,972.61 = 71,476.60/x
  3. Step 3: Cross multiply
    78,984.68x = 117,972.61 × 71,476.60
  4. Step 4: Simplify right side
    78,984.68x = 8,432,281,055.93
  5. Step 5: Solve for x
    x = 8,432,281,055.93/78,984.68
  6. Step 6: Final answer
    x = 106,758.44

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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.