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Finding the Fourth Proportional to 72,177.92, 99,602.04 and 40,346.56

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Solution

The fourth proportional to 72,177.92, 99,602.04 and 40,346.56 is: 55,676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,177.92 : 99,602.04 = 40,346.56 : x
  2. Step 2: Convert to fraction form
    72,177.92/99,602.04 = 40,346.56/x
  3. Step 3: Cross multiply
    72,177.92x = 99,602.04 × 40,346.56
  4. Step 4: Simplify right side
    72,177.92x = 4,018,599,682.98
  5. Step 5: Solve for x
    x = 4,018,599,682.98/72,177.92
  6. Step 6: Final answer
    x = 55,676.30

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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.