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Finding the Fourth Proportional to 70,448.90, 105,498.05 and 49,289.95

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Solution

The fourth proportional to 70,448.90, 105,498.05 and 49,289.95 is: 73,812.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,448.90 : 105,498.05 = 49,289.95 : x
  2. Step 2: Convert to fraction form
    70,448.90/105,498.05 = 49,289.95/x
  3. Step 3: Cross multiply
    70,448.90x = 105,498.05 × 49,289.95
  4. Step 4: Simplify right side
    70,448.90x = 5,199,993,609.60
  5. Step 5: Solve for x
    x = 5,199,993,609.60/70,448.90
  6. Step 6: Final answer
    x = 73,812.28

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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.