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Finding the Fourth Proportional to 73,778.40, 110,656.80 and 21,182.40

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Solution

The fourth proportional to 73,778.40, 110,656.80 and 21,182.40 is: 31,770.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,778.40 : 110,656.80 = 21,182.40 : x
  2. Step 2: Convert to fraction form
    73,778.40/110,656.80 = 21,182.40/x
  3. Step 3: Cross multiply
    73,778.40x = 110,656.80 × 21,182.40
  4. Step 4: Simplify right side
    73,778.40x = 2,343,976,600.32
  5. Step 5: Solve for x
    x = 2,343,976,600.32/73,778.40
  6. Step 6: Final answer
    x = 31,770.50

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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.