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Finding the Fourth Proportional to 70,519.17, 105,788.63 and 20,602.92

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Solution

The fourth proportional to 70,519.17, 105,788.63 and 20,602.92 is: 30,907.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,519.17 : 105,788.63 = 20,602.92 : x
  2. Step 2: Convert to fraction form
    70,519.17/105,788.63 = 20,602.92/x
  3. Step 3: Cross multiply
    70,519.17x = 105,788.63 × 20,602.92
  4. Step 4: Simplify right side
    70,519.17x = 2,179,554,048.84
  5. Step 5: Solve for x
    x = 2,179,554,048.84/70,519.17
  6. Step 6: Final answer
    x = 30,907.26

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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.