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Finding the Fourth Proportional to 73,878.60, 110,688.30 and 60,659.40

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Solution

The fourth proportional to 73,878.60, 110,688.30 and 60,659.40 is: 90,882.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,878.60 : 110,688.30 = 60,659.40 : x
  2. Step 2: Convert to fraction form
    73,878.60/110,688.30 = 60,659.40/x
  3. Step 3: Cross multiply
    73,878.60x = 110,688.30 × 60,659.40
  4. Step 4: Simplify right side
    73,878.60x = 6,714,285,865.02
  5. Step 5: Solve for x
    x = 6,714,285,865.02/73,878.60
  6. Step 6: Final answer
    x = 90,882.69

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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.