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Finding the Fourth Proportional to 70,673.82, 106,009.85 and 20,752.11

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Solution

The fourth proportional to 70,673.82, 106,009.85 and 20,752.11 is: 31,127.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,673.82 : 106,009.85 = 20,752.11 : x
  2. Step 2: Convert to fraction form
    70,673.82/106,009.85 = 20,752.11/x
  3. Step 3: Cross multiply
    70,673.82x = 106,009.85 × 20,752.11
  4. Step 4: Simplify right side
    70,673.82x = 2,199,927,964.52
  5. Step 5: Solve for x
    x = 2,199,927,964.52/70,673.82
  6. Step 6: Final answer
    x = 31,127.91

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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.