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Finding the Fourth Proportional to 103,346.10, 155,020.02 and 28,470.42

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Solution

The fourth proportional to 103,346.10, 155,020.02 and 28,470.42 is: 42,705.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,346.10 : 155,020.02 = 28,470.42 : x
  2. Step 2: Convert to fraction form
    103,346.10/155,020.02 = 28,470.42/x
  3. Step 3: Cross multiply
    103,346.10x = 155,020.02 × 28,470.42
  4. Step 4: Simplify right side
    103,346.10x = 4,413,485,077.81
  5. Step 5: Solve for x
    x = 4,413,485,077.81/103,346.10
  6. Step 6: Final answer
    x = 42,705.87

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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.