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Finding the Fourth Proportional to 123,099.84, 169,890.62 and 75,384.90

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Solution

The fourth proportional to 123,099.84, 169,890.62 and 75,384.90 is: 104,039.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,099.84 : 169,890.62 = 75,384.90 : x
  2. Step 2: Convert to fraction form
    123,099.84/169,890.62 = 75,384.90/x
  3. Step 3: Cross multiply
    123,099.84x = 169,890.62 × 75,384.90
  4. Step 4: Simplify right side
    123,099.84x = 12,807,187,022.71
  5. Step 5: Solve for x
    x = 12,807,187,022.71/123,099.84
  6. Step 6: Final answer
    x = 104,039.02

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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.