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Finding the Fourth Proportional to 123,687.68, 170,688.65 and 67,099.07

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Solution

The fourth proportional to 123,687.68, 170,688.65 and 67,099.07 is: 92,596.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,687.68 : 170,688.65 = 67,099.07 : x
  2. Step 2: Convert to fraction form
    123,687.68/170,688.65 = 67,099.07/x
  3. Step 3: Cross multiply
    123,687.68x = 170,688.65 × 67,099.07
  4. Step 4: Simplify right side
    123,687.68x = 11,453,049,339.06
  5. Step 5: Solve for x
    x = 11,453,049,339.06/123,687.68
  6. Step 6: Final answer
    x = 92,596.52

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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.