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Finding the Fourth Proportional to 72,774.49, 100,408.63 and 43,695.30

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Solution

The fourth proportional to 72,774.49, 100,408.63 and 43,695.30 is: 60,287.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,774.49 : 100,408.63 = 43,695.30 : x
  2. Step 2: Convert to fraction form
    72,774.49/100,408.63 = 43,695.30/x
  3. Step 3: Cross multiply
    72,774.49x = 100,408.63 × 43,695.30
  4. Step 4: Simplify right side
    72,774.49x = 4,387,385,210.44
  5. Step 5: Solve for x
    x = 4,387,385,210.44/72,774.49
  6. Step 6: Final answer
    x = 60,287.41

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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.