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Finding the Fourth Proportional to 74,257.60, 111,386.64 and 18,853.60

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Solution

The fourth proportional to 74,257.60, 111,386.64 and 18,853.60 is: 28,280.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,257.60 : 111,386.64 = 18,853.60 : x
  2. Step 2: Convert to fraction form
    74,257.60/111,386.64 = 18,853.60/x
  3. Step 3: Cross multiply
    74,257.60x = 111,386.64 × 18,853.60
  4. Step 4: Simplify right side
    74,257.60x = 2,100,039,155.90
  5. Step 5: Solve for x
    x = 2,100,039,155.90/74,257.60
  6. Step 6: Final answer
    x = 28,280.46

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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.