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Finding the Fourth Proportional to 72,770.80, 100,408.48 and 42,550.16

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Solution

The fourth proportional to 72,770.80, 100,408.48 and 42,550.16 is: 58,710.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,770.80 : 100,408.48 = 42,550.16 : x
  2. Step 2: Convert to fraction form
    72,770.80/100,408.48 = 42,550.16/x
  3. Step 3: Cross multiply
    72,770.80x = 100,408.48 × 42,550.16
  4. Step 4: Simplify right side
    72,770.80x = 4,272,396,889.36
  5. Step 5: Solve for x
    x = 4,272,396,889.36/72,770.80
  6. Step 6: Final answer
    x = 58,710.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.