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Finding the Fourth Proportional to 70,616.55, 97,427.13 and 39,985.46

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Solution

The fourth proportional to 70,616.55, 97,427.13 and 39,985.46 is: 55,166.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,616.55 : 97,427.13 = 39,985.46 : x
  2. Step 2: Convert to fraction form
    70,616.55/97,427.13 = 39,985.46/x
  3. Step 3: Cross multiply
    70,616.55x = 97,427.13 × 39,985.46
  4. Step 4: Simplify right side
    70,616.55x = 3,895,668,609.53
  5. Step 5: Solve for x
    x = 3,895,668,609.53/70,616.55
  6. Step 6: Final answer
    x = 55,166.51

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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.