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Finding the Fourth Proportional to 136,420.30, 204,630.45 and 42,913.90

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Solution

The fourth proportional to 136,420.30, 204,630.45 and 42,913.90 is: 64,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,420.30 : 204,630.45 = 42,913.90 : x
  2. Step 2: Convert to fraction form
    136,420.30/204,630.45 = 42,913.90/x
  3. Step 3: Cross multiply
    136,420.30x = 204,630.45 × 42,913.90
  4. Step 4: Simplify right side
    136,420.30x = 8,781,490,668.26
  5. Step 5: Solve for x
    x = 8,781,490,668.26/136,420.30
  6. Step 6: Final answer
    x = 64,370.85

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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.