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Finding the Fourth Proportional to 123,957.72, 171,055.08 and 70,243.40

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Solution

The fourth proportional to 123,957.72, 171,055.08 and 70,243.40 is: 96,932.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,957.72 : 171,055.08 = 70,243.40 : x
  2. Step 2: Convert to fraction form
    123,957.72/171,055.08 = 70,243.40/x
  3. Step 3: Cross multiply
    123,957.72x = 171,055.08 × 70,243.40
  4. Step 4: Simplify right side
    123,957.72x = 12,015,490,406.47
  5. Step 5: Solve for x
    x = 12,015,490,406.47/123,957.72
  6. Step 6: Final answer
    x = 96,932.17

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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.