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Finding the Fourth Proportional to 74,987.20, 112,480.80 and 74,987.20

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Solution

The fourth proportional to 74,987.20, 112,480.80 and 74,987.20 is: 112,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,987.20 : 112,480.80 = 74,987.20 : x
  2. Step 2: Convert to fraction form
    74,987.20/112,480.80 = 74,987.20/x
  3. Step 3: Cross multiply
    74,987.20x = 112,480.80 × 74,987.20
  4. Step 4: Simplify right side
    74,987.20x = 8,434,620,245.76
  5. Step 5: Solve for x
    x = 8,434,620,245.76/74,987.20
  6. Step 6: Final answer
    x = 112,480.80

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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.