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Finding the Fourth Proportional to 103,652.36, 155,478.01 and 40,478.90

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Solution

The fourth proportional to 103,652.36, 155,478.01 and 40,478.90 is: 60,718.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,652.36 : 155,478.01 = 40,478.90 : x
  2. Step 2: Convert to fraction form
    103,652.36/155,478.01 = 40,478.90/x
  3. Step 3: Cross multiply
    103,652.36x = 155,478.01 × 40,478.90
  4. Step 4: Simplify right side
    103,652.36x = 6,293,578,286.55
  5. Step 5: Solve for x
    x = 6,293,578,286.55/103,652.36
  6. Step 6: Final answer
    x = 60,718.14

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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.