Home / 78,074.76-117,071.16-40,543.08

Finding the Fourth Proportional to 78,074.76, 117,071.16 and 40,543.08

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Solution

The fourth proportional to 78,074.76, 117,071.16 and 40,543.08 is: 60,793.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,074.76 : 117,071.16 = 40,543.08 : x
  2. Step 2: Convert to fraction form
    78,074.76/117,071.16 = 40,543.08/x
  3. Step 3: Cross multiply
    78,074.76x = 117,071.16 × 40,543.08
  4. Step 4: Simplify right side
    78,074.76x = 4,746,425,405.57
  5. Step 5: Solve for x
    x = 4,746,425,405.57/78,074.76
  6. Step 6: Final answer
    x = 60,793.34

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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.