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Finding the Fourth Proportional to 78,819.10, 118,228.65 and 74,211.10

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Solution

The fourth proportional to 78,819.10, 118,228.65 and 74,211.10 is: 111,316.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,819.10 : 118,228.65 = 74,211.10 : x
  2. Step 2: Convert to fraction form
    78,819.10/118,228.65 = 74,211.10/x
  3. Step 3: Cross multiply
    78,819.10x = 118,228.65 × 74,211.10
  4. Step 4: Simplify right side
    78,819.10x = 8,773,878,168.02
  5. Step 5: Solve for x
    x = 8,773,878,168.02/78,819.10
  6. Step 6: Final answer
    x = 111,316.65

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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.