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Finding the Fourth Proportional to 70,979.69, 97,950.26 and 39,147.91

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Solution

The fourth proportional to 70,979.69, 97,950.26 and 39,147.91 is: 54,023.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,979.69 : 97,950.26 = 39,147.91 : x
  2. Step 2: Convert to fraction form
    70,979.69/97,950.26 = 39,147.91/x
  3. Step 3: Cross multiply
    70,979.69x = 97,950.26 × 39,147.91
  4. Step 4: Simplify right side
    70,979.69x = 3,834,547,815.95
  5. Step 5: Solve for x
    x = 3,834,547,815.95/70,979.69
  6. Step 6: Final answer
    x = 54,023.17

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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.