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Finding the Fourth Proportional to 74,400.80, 111,514.80 and 30,005.60

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Solution

The fourth proportional to 74,400.80, 111,514.80 and 30,005.60 is: 44,973.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,400.80 : 111,514.80 = 30,005.60 : x
  2. Step 2: Convert to fraction form
    74,400.80/111,514.80 = 30,005.60/x
  3. Step 3: Cross multiply
    74,400.80x = 111,514.80 × 30,005.60
  4. Step 4: Simplify right side
    74,400.80x = 3,346,068,482.88
  5. Step 5: Solve for x
    x = 3,346,068,482.88/74,400.80
  6. Step 6: Final answer
    x = 44,973.56

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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.