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Finding the Fourth Proportional to 123,688.88, 170,690.70 and 69,972.75

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Solution

The fourth proportional to 123,688.88, 170,690.70 and 69,972.75 is: 96,562.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,688.88 : 170,690.70 = 69,972.75 : x
  2. Step 2: Convert to fraction form
    123,688.88/170,690.70 = 69,972.75/x
  3. Step 3: Cross multiply
    123,688.88x = 170,690.70 × 69,972.75
  4. Step 4: Simplify right side
    123,688.88x = 11,943,697,678.43
  5. Step 5: Solve for x
    x = 11,943,697,678.43/123,688.88
  6. Step 6: Final answer
    x = 96,562.42

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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.