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Finding the Fourth Proportional to 78,898.80, 110,691.60 and 78,898.80

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Solution

The fourth proportional to 78,898.80, 110,691.60 and 78,898.80 is: 110,691.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,898.80 : 110,691.60 = 78,898.80 : x
  2. Step 2: Convert to fraction form
    78,898.80/110,691.60 = 78,898.80/x
  3. Step 3: Cross multiply
    78,898.80x = 110,691.60 × 78,898.80
  4. Step 4: Simplify right side
    78,898.80x = 8,733,434,410.08
  5. Step 5: Solve for x
    x = 8,733,434,410.08/78,898.80
  6. Step 6: Final answer
    x = 110,691.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.