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Finding the Fourth Proportional to 70,259.52, 105,394.77 and 20,340.36

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Solution

The fourth proportional to 70,259.52, 105,394.77 and 20,340.36 is: 30,512.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,259.52 : 105,394.77 = 20,340.36 : x
  2. Step 2: Convert to fraction form
    70,259.52/105,394.77 = 20,340.36/x
  3. Step 3: Cross multiply
    70,259.52x = 105,394.77 × 20,340.36
  4. Step 4: Simplify right side
    70,259.52x = 2,143,767,563.92
  5. Step 5: Solve for x
    x = 2,143,767,563.92/70,259.52
  6. Step 6: Final answer
    x = 30,512.13

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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.