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Finding the Fourth Proportional to 67,618.40, 101,437.20 and 20,866.40

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Solution

The fourth proportional to 67,618.40, 101,437.20 and 20,866.40 is: 31,302.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,618.40 : 101,437.20 = 20,866.40 : x
  2. Step 2: Convert to fraction form
    67,618.40/101,437.20 = 20,866.40/x
  3. Step 3: Cross multiply
    67,618.40x = 101,437.20 × 20,866.40
  4. Step 4: Simplify right side
    67,618.40x = 2,116,629,190.08
  5. Step 5: Solve for x
    x = 2,116,629,190.08/67,618.40
  6. Step 6: Final answer
    x = 31,302.56

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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.