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Finding the Fourth Proportional to 72,221.76, 99,675.30 and 40,392.42

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Solution

The fourth proportional to 72,221.76, 99,675.30 and 40,392.42 is: 55,746.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,221.76 : 99,675.30 = 40,392.42 : x
  2. Step 2: Convert to fraction form
    72,221.76/99,675.30 = 40,392.42/x
  3. Step 3: Cross multiply
    72,221.76x = 99,675.30 × 40,392.42
  4. Step 4: Simplify right side
    72,221.76x = 4,026,126,581.23
  5. Step 5: Solve for x
    x = 4,026,126,581.23/72,221.76
  6. Step 6: Final answer
    x = 55,746.72

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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.