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Finding the Fourth Proportional to 70,470.86, 97,249.64 and 38,639.70

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Solution

The fourth proportional to 70,470.86, 97,249.64 and 38,639.70 is: 53,322.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,470.86 : 97,249.64 = 38,639.70 : x
  2. Step 2: Convert to fraction form
    70,470.86/97,249.64 = 38,639.70/x
  3. Step 3: Cross multiply
    70,470.86x = 97,249.64 × 38,639.70
  4. Step 4: Simplify right side
    70,470.86x = 3,757,696,721.51
  5. Step 5: Solve for x
    x = 3,757,696,721.51/70,470.86
  6. Step 6: Final answer
    x = 53,322.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.