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Finding the Fourth Proportional to 74,382.75, 111,574.13 and 18,978.75

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Solution

The fourth proportional to 74,382.75, 111,574.13 and 18,978.75 is: 28,468.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,382.75 : 111,574.13 = 18,978.75 : x
  2. Step 2: Convert to fraction form
    74,382.75/111,574.13 = 18,978.75/x
  3. Step 3: Cross multiply
    74,382.75x = 111,574.13 × 18,978.75
  4. Step 4: Simplify right side
    74,382.75x = 2,117,537,424.84
  5. Step 5: Solve for x
    x = 2,117,537,424.84/74,382.75
  6. Step 6: Final answer
    x = 28,468.13

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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.