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Finding the Fourth Proportional to 70,957.20, 97,921.14 and 39,125.40

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Solution

The fourth proportional to 70,957.20, 97,921.14 and 39,125.40 is: 53,993.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,957.20 : 97,921.14 = 39,125.40 : x
  2. Step 2: Convert to fraction form
    70,957.20/97,921.14 = 39,125.40/x
  3. Step 3: Cross multiply
    70,957.20x = 97,921.14 × 39,125.40
  4. Step 4: Simplify right side
    70,957.20x = 3,831,203,770.96
  5. Step 5: Solve for x
    x = 3,831,203,770.96/70,957.20
  6. Step 6: Final answer
    x = 53,993.16

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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.