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Finding the Fourth Proportional to 70,928.79, 97,879.86 and 39,097.81

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Solution

The fourth proportional to 70,928.79, 97,879.86 and 39,097.81 is: 53,953.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,928.79 : 97,879.86 = 39,097.81 : x
  2. Step 2: Convert to fraction form
    70,928.79/97,879.86 = 39,097.81/x
  3. Step 3: Cross multiply
    70,928.79x = 97,879.86 × 39,097.81
  4. Step 4: Simplify right side
    70,928.79x = 3,826,888,169.11
  5. Step 5: Solve for x
    x = 3,826,888,169.11/70,928.79
  6. Step 6: Final answer
    x = 53,953.95

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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.