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Finding the Fourth Proportional to 70,355.20, 105,686.40 and 49,619.20

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Solution

The fourth proportional to 70,355.20, 105,686.40 and 49,619.20 is: 74,537.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,355.20 : 105,686.40 = 49,619.20 : x
  2. Step 2: Convert to fraction form
    70,355.20/105,686.40 = 49,619.20/x
  3. Step 3: Cross multiply
    70,355.20x = 105,686.40 × 49,619.20
  4. Step 4: Simplify right side
    70,355.20x = 5,244,074,618.88
  5. Step 5: Solve for x
    x = 5,244,074,618.88/70,355.20
  6. Step 6: Final answer
    x = 74,537.13

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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.