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Finding the Fourth Proportional to 103,638.60, 155,688.30 and 100,873.80

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Solution

The fourth proportional to 103,638.60, 155,688.30 and 100,873.80 is: 151,534.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.60 : 155,688.30 = 100,873.80 : x
  2. Step 2: Convert to fraction form
    103,638.60/155,688.30 = 100,873.80/x
  3. Step 3: Cross multiply
    103,638.60x = 155,688.30 × 100,873.80
  4. Step 4: Simplify right side
    103,638.60x = 15,704,870,436.54
  5. Step 5: Solve for x
    x = 15,704,870,436.54/103,638.60
  6. Step 6: Final answer
    x = 151,534.95

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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.