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Finding the Fourth Proportional to 70,483.80, 105,743.70 and 49,747.80

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Solution

The fourth proportional to 70,483.80, 105,743.70 and 49,747.80 is: 74,634.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,483.80 : 105,743.70 = 49,747.80 : x
  2. Step 2: Convert to fraction form
    70,483.80/105,743.70 = 49,747.80/x
  3. Step 3: Cross multiply
    70,483.80x = 105,743.70 × 49,747.80
  4. Step 4: Simplify right side
    70,483.80x = 5,260,516,438.86
  5. Step 5: Solve for x
    x = 5,260,516,438.86/70,483.80
  6. Step 6: Final answer
    x = 74,634.40

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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.