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Finding the Fourth Proportional to 123,812.56, 170,858.20 and 70,097.20

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Solution

The fourth proportional to 123,812.56, 170,858.20 and 70,097.20 is: 96,732.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,812.56 : 170,858.20 = 70,097.20 : x
  2. Step 2: Convert to fraction form
    123,812.56/170,858.20 = 70,097.20/x
  3. Step 3: Cross multiply
    123,812.56x = 170,858.20 × 70,097.20
  4. Step 4: Simplify right side
    123,812.56x = 11,976,681,417.04
  5. Step 5: Solve for x
    x = 11,976,681,417.04/123,812.56
  6. Step 6: Final answer
    x = 96,732.36

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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.