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Finding the Fourth Proportional to 70,708.79, 97,578.50 and 38,879.74

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Solution

The fourth proportional to 70,708.79, 97,578.50 and 38,879.74 is: 53,654.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,708.79 : 97,578.50 = 38,879.74 : x
  2. Step 2: Convert to fraction form
    70,708.79/97,578.50 = 38,879.74/x
  3. Step 3: Cross multiply
    70,708.79x = 97,578.50 × 38,879.74
  4. Step 4: Simplify right side
    70,708.79x = 3,793,826,271.25
  5. Step 5: Solve for x
    x = 3,793,826,271.25/70,708.79
  6. Step 6: Final answer
    x = 53,654.24

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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.