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Finding the Fourth Proportional to 123,642.84, 170,667.36 and 72,654.68

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Solution

The fourth proportional to 123,642.84, 170,667.36 and 72,654.68 is: 100,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,642.84 : 170,667.36 = 72,654.68 : x
  2. Step 2: Convert to fraction form
    123,642.84/170,667.36 = 72,654.68/x
  3. Step 3: Cross multiply
    123,642.84x = 170,667.36 × 72,654.68
  4. Step 4: Simplify right side
    123,642.84x = 12,399,782,427.24
  5. Step 5: Solve for x
    x = 12,399,782,427.24/123,642.84
  6. Step 6: Final answer
    x = 100,287.10

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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.