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Finding the Fourth Proportional to 67,313.79, 100,990.48 and 19,930.14

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Solution

The fourth proportional to 67,313.79, 100,990.48 and 19,930.14 is: 29,901.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,313.79 : 100,990.48 = 19,930.14 : x
  2. Step 2: Convert to fraction form
    67,313.79/100,990.48 = 19,930.14/x
  3. Step 3: Cross multiply
    67,313.79x = 100,990.48 × 19,930.14
  4. Step 4: Simplify right side
    67,313.79x = 2,012,754,208.55
  5. Step 5: Solve for x
    x = 2,012,754,208.55/67,313.79
  6. Step 6: Final answer
    x = 29,901.07

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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.