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Finding the Fourth Proportional to 103,675.69, 155,471.68 and 40,486.78

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Solution

The fourth proportional to 103,675.69, 155,471.68 and 40,486.78 is: 60,713.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,675.69 : 155,471.68 = 40,486.78 : x
  2. Step 2: Convert to fraction form
    103,675.69/155,471.68 = 40,486.78/x
  3. Step 3: Cross multiply
    103,675.69x = 155,471.68 × 40,486.78
  4. Step 4: Simplify right side
    103,675.69x = 6,294,547,704.39
  5. Step 5: Solve for x
    x = 6,294,547,704.39/103,675.69
  6. Step 6: Final answer
    x = 60,713.83

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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.