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Finding the Fourth Proportional to 72,663.15, 100,324.04 and 64,982.59

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Solution

The fourth proportional to 72,663.15, 100,324.04 and 64,982.59 is: 89,719.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,663.15 : 100,324.04 = 64,982.59 : x
  2. Step 2: Convert to fraction form
    72,663.15/100,324.04 = 64,982.59/x
  3. Step 3: Cross multiply
    72,663.15x = 100,324.04 × 64,982.59
  4. Step 4: Simplify right side
    72,663.15x = 6,519,315,958.46
  5. Step 5: Solve for x
    x = 6,519,315,958.46/72,663.15
  6. Step 6: Final answer
    x = 89,719.70

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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.