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Finding the Fourth Proportional to 103,291.85, 154,938.45 and 28,419.90

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Solution

The fourth proportional to 103,291.85, 154,938.45 and 28,419.90 is: 42,630.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,291.85 : 154,938.45 = 28,419.90 : x
  2. Step 2: Convert to fraction form
    103,291.85/154,938.45 = 28,419.90/x
  3. Step 3: Cross multiply
    103,291.85x = 154,938.45 × 28,419.90
  4. Step 4: Simplify right side
    103,291.85x = 4,403,335,255.16
  5. Step 5: Solve for x
    x = 4,403,335,255.16/103,291.85
  6. Step 6: Final answer
    x = 42,630.04

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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.