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Finding the Fourth Proportional to 102,987, 154,481.45 and 40,657.50

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Solution

The fourth proportional to 102,987, 154,481.45 and 40,657.50 is: 60,986.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,987 : 154,481.45 = 40,657.50 : x
  2. Step 2: Convert to fraction form
    102,987/154,481.45 = 40,657.50/x
  3. Step 3: Cross multiply
    102,987x = 154,481.45 × 40,657.50
  4. Step 4: Simplify right side
    102,987x = 6,280,829,350.09
  5. Step 5: Solve for x
    x = 6,280,829,350.09/102,987
  6. Step 6: Final answer
    x = 60,986.62

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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.