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Finding the Fourth Proportional to 84,498.80, 126,748.20 and 49,420.40

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Solution

The fourth proportional to 84,498.80, 126,748.20 and 49,420.40 is: 74,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,498.80 : 126,748.20 = 49,420.40 : x
  2. Step 2: Convert to fraction form
    84,498.80/126,748.20 = 49,420.40/x
  3. Step 3: Cross multiply
    84,498.80x = 126,748.20 × 49,420.40
  4. Step 4: Simplify right side
    84,498.80x = 6,263,946,743.28
  5. Step 5: Solve for x
    x = 6,263,946,743.28/84,498.80
  6. Step 6: Final answer
    x = 74,130.60

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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.