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Finding the Fourth Proportional to 103,434.12, 155,151.18 and 28,551.78

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Solution

The fourth proportional to 103,434.12, 155,151.18 and 28,551.78 is: 42,827.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,434.12 : 155,151.18 = 28,551.78 : x
  2. Step 2: Convert to fraction form
    103,434.12/155,151.18 = 28,551.78/x
  3. Step 3: Cross multiply
    103,434.12x = 155,151.18 × 28,551.78
  4. Step 4: Simplify right side
    103,434.12x = 4,429,842,358.10
  5. Step 5: Solve for x
    x = 4,429,842,358.10/103,434.12
  6. Step 6: Final answer
    x = 42,827.67

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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.