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Finding the Fourth Proportional to 123,665.87, 170,819.07 and 91,465.94

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Solution

The fourth proportional to 123,665.87, 170,819.07 and 91,465.94 is: 126,341.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,665.87 : 170,819.07 = 91,465.94 : x
  2. Step 2: Convert to fraction form
    123,665.87/170,819.07 = 91,465.94/x
  3. Step 3: Cross multiply
    123,665.87x = 170,819.07 × 91,465.94
  4. Step 4: Simplify right side
    123,665.87x = 15,624,125,953.38
  5. Step 5: Solve for x
    x = 15,624,125,953.38/123,665.87
  6. Step 6: Final answer
    x = 126,341.46

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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.