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Finding the Fourth Proportional to 70,508.26, 105,621.36 and 42,412.81

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Solution

The fourth proportional to 70,508.26, 105,621.36 and 42,412.81 is: 63,534.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,508.26 : 105,621.36 = 42,412.81 : x
  2. Step 2: Convert to fraction form
    70,508.26/105,621.36 = 42,412.81/x
  3. Step 3: Cross multiply
    70,508.26x = 105,621.36 × 42,412.81
  4. Step 4: Simplify right side
    70,508.26x = 4,479,698,673.62
  5. Step 5: Solve for x
    x = 4,479,698,673.62/70,508.26
  6. Step 6: Final answer
    x = 63,534.38

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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.