Home / 89,390.70-123,320.07-55,390.14

Finding the Fourth Proportional to 89,390.70, 123,320.07 and 55,390.14

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Solution

The fourth proportional to 89,390.70, 123,320.07 and 55,390.14 is: 76,414.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,390.70 : 123,320.07 = 55,390.14 : x
  2. Step 2: Convert to fraction form
    89,390.70/123,320.07 = 55,390.14/x
  3. Step 3: Cross multiply
    89,390.70x = 123,320.07 × 55,390.14
  4. Step 4: Simplify right side
    89,390.70x = 6,830,715,942.11
  5. Step 5: Solve for x
    x = 6,830,715,942.11/89,390.70
  6. Step 6: Final answer
    x = 76,414.17

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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.