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Finding the Fourth Proportional to 78,348.60, 117,350.10 and 67,980.60

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Solution

The fourth proportional to 78,348.60, 117,350.10 and 67,980.60 is: 101,820.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,348.60 : 117,350.10 = 67,980.60 : x
  2. Step 2: Convert to fraction form
    78,348.60/117,350.10 = 67,980.60/x
  3. Step 3: Cross multiply
    78,348.60x = 117,350.10 × 67,980.60
  4. Step 4: Simplify right side
    78,348.60x = 7,977,530,208.06
  5. Step 5: Solve for x
    x = 7,977,530,208.06/78,348.60
  6. Step 6: Final answer
    x = 101,820.97

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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.