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Finding the Fourth Proportional to 70,721.69, 97,587.74 and 40,505.22

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Solution

The fourth proportional to 70,721.69, 97,587.74 and 40,505.22 is: 55,892.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,721.69 : 97,587.74 = 40,505.22 : x
  2. Step 2: Convert to fraction form
    70,721.69/97,587.74 = 40,505.22/x
  3. Step 3: Cross multiply
    70,721.69x = 97,587.74 × 40,505.22
  4. Step 4: Simplify right side
    70,721.69x = 3,952,812,675.48
  5. Step 5: Solve for x
    x = 3,952,812,675.48/70,721.69
  6. Step 6: Final answer
    x = 55,892.51

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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.