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Finding the Fourth Proportional to 70,473.71, 105,726.11 and 20,557.71

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Solution

The fourth proportional to 70,473.71, 105,726.11 and 20,557.71 is: 30,841.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,473.71 : 105,726.11 = 20,557.71 : x
  2. Step 2: Convert to fraction form
    70,473.71/105,726.11 = 20,557.71/x
  3. Step 3: Cross multiply
    70,473.71x = 105,726.11 × 20,557.71
  4. Step 4: Simplify right side
    70,473.71x = 2,173,486,708.81
  5. Step 5: Solve for x
    x = 2,173,486,708.81/70,473.71
  6. Step 6: Final answer
    x = 30,841.10

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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.