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Finding the Fourth Proportional to 70,695, 97,561.38 and 38,866.20

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Solution

The fourth proportional to 70,695, 97,561.38 and 38,866.20 is: 53,636.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,695 : 97,561.38 = 38,866.20 : x
  2. Step 2: Convert to fraction form
    70,695/97,561.38 = 38,866.20/x
  3. Step 3: Cross multiply
    70,695x = 97,561.38 × 38,866.20
  4. Step 4: Simplify right side
    70,695x = 3,791,840,107.36
  5. Step 5: Solve for x
    x = 3,791,840,107.36/70,695
  6. Step 6: Final answer
    x = 53,636.61

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1.5x scale

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.