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Finding the Fourth Proportional to 71,670.72, 107,510.19 and 21,752.45

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Solution

The fourth proportional to 71,670.72, 107,510.19 and 21,752.45 is: 32,629.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,670.72 : 107,510.19 = 21,752.45 : x
  2. Step 2: Convert to fraction form
    71,670.72/107,510.19 = 21,752.45/x
  3. Step 3: Cross multiply
    71,670.72x = 107,510.19 × 21,752.45
  4. Step 4: Simplify right side
    71,670.72x = 2,338,609,816.51
  5. Step 5: Solve for x
    x = 2,338,609,816.51/71,670.72
  6. Step 6: Final answer
    x = 32,629.92

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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.