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Finding the Fourth Proportional to 70,418.92, 105,487.67 and 42,323.80

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Solution

The fourth proportional to 70,418.92, 105,487.67 and 42,323.80 is: 63,401.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,418.92 : 105,487.67 = 42,323.80 : x
  2. Step 2: Convert to fraction form
    70,418.92/105,487.67 = 42,323.80/x
  3. Step 3: Cross multiply
    70,418.92x = 105,487.67 × 42,323.80
  4. Step 4: Simplify right side
    70,418.92x = 4,464,638,889.64
  5. Step 5: Solve for x
    x = 4,464,638,889.64/70,418.92
  6. Step 6: Final answer
    x = 63,401.13

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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.