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Finding the Fourth Proportional to 70,776.20, 97,660 and 40,555.71

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Solution

The fourth proportional to 70,776.20, 97,660 and 40,555.71 is: 55,960.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,776.20 : 97,660 = 40,555.71 : x
  2. Step 2: Convert to fraction form
    70,776.20/97,660 = 40,555.71/x
  3. Step 3: Cross multiply
    70,776.20x = 97,660 × 40,555.71
  4. Step 4: Simplify right side
    70,776.20x = 3,960,670,638.60
  5. Step 5: Solve for x
    x = 3,960,670,638.60/70,776.20
  6. Step 6: Final answer
    x = 55,960.49

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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.