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Finding the Fourth Proportional to 70,479.47, 105,719.55 and 17,888.97

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Solution

The fourth proportional to 70,479.47, 105,719.55 and 17,888.97 is: 26,833.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,479.47 : 105,719.55 = 17,888.97 : x
  2. Step 2: Convert to fraction form
    70,479.47/105,719.55 = 17,888.97/x
  3. Step 3: Cross multiply
    70,479.47x = 105,719.55 × 17,888.97
  4. Step 4: Simplify right side
    70,479.47x = 1,891,213,329.77
  5. Step 5: Solve for x
    x = 1,891,213,329.77/70,479.47
  6. Step 6: Final answer
    x = 26,833.54

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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.