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Finding the Fourth Proportional to 207,316, 310,961.70 and 121,974.82

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Solution

The fourth proportional to 207,316, 310,961.70 and 121,974.82 is: 182,954.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,316 : 310,961.70 = 121,974.82 : x
  2. Step 2: Convert to fraction form
    207,316/310,961.70 = 121,974.82/x
  3. Step 3: Cross multiply
    207,316x = 310,961.70 × 121,974.82
  4. Step 4: Simplify right side
    207,316x = 37,929,497,384.39
  5. Step 5: Solve for x
    x = 37,929,497,384.39/207,316
  6. Step 6: Final answer
    x = 182,954.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.