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Finding the Fourth Proportional to 70,957.91, 97,921.76 and 39,126.93

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Solution

The fourth proportional to 70,957.91, 97,921.76 and 39,126.93 is: 53,995.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,957.91 : 97,921.76 = 39,126.93 : x
  2. Step 2: Convert to fraction form
    70,957.91/97,921.76 = 39,126.93/x
  3. Step 3: Cross multiply
    70,957.91x = 97,921.76 × 39,126.93
  4. Step 4: Simplify right side
    70,957.91x = 3,831,377,653.36
  5. Step 5: Solve for x
    x = 3,831,377,653.36/70,957.91
  6. Step 6: Final answer
    x = 53,995.08

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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.