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Finding the Fourth Proportional to 123,955.80, 171,000.56 and 89,889.54

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Solution

The fourth proportional to 123,955.80, 171,000.56 and 89,889.54 is: 124,005.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,955.80 : 171,000.56 = 89,889.54 : x
  2. Step 2: Convert to fraction form
    123,955.80/171,000.56 = 89,889.54/x
  3. Step 3: Cross multiply
    123,955.80x = 171,000.56 × 89,889.54
  4. Step 4: Simplify right side
    123,955.80x = 15,371,161,678.14
  5. Step 5: Solve for x
    x = 15,371,161,678.14/123,955.80
  6. Step 6: Final answer
    x = 124,005.18

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1.5x scale

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.