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Finding the Fourth Proportional to 74,283.60, 111,425.64 and 18,879.60

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Solution

The fourth proportional to 74,283.60, 111,425.64 and 18,879.60 is: 28,319.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,283.60 : 111,425.64 = 18,879.60 : x
  2. Step 2: Convert to fraction form
    74,283.60/111,425.64 = 18,879.60/x
  3. Step 3: Cross multiply
    74,283.60x = 111,425.64 × 18,879.60
  4. Step 4: Simplify right side
    74,283.60x = 2,103,671,512.94
  5. Step 5: Solve for x
    x = 2,103,671,512.94/74,283.60
  6. Step 6: Final answer
    x = 28,319.46

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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.