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Finding the Fourth Proportional to 103,434.67, 155,148.90 and 28,559.38

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Solution

The fourth proportional to 103,434.67, 155,148.90 and 28,559.38 is: 42,838.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,434.67 : 155,148.90 = 28,559.38 : x
  2. Step 2: Convert to fraction form
    103,434.67/155,148.90 = 28,559.38/x
  3. Step 3: Cross multiply
    103,434.67x = 155,148.90 × 28,559.38
  4. Step 4: Simplify right side
    103,434.67x = 4,430,956,391.68
  5. Step 5: Solve for x
    x = 4,430,956,391.68/103,434.67
  6. Step 6: Final answer
    x = 42,838.21

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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.