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Finding the Fourth Proportional to 72,200.77, 108,308.75 and 18,901.15

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Solution

The fourth proportional to 72,200.77, 108,308.75 and 18,901.15 is: 28,353.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,200.77 : 108,308.75 = 18,901.15 : x
  2. Step 2: Convert to fraction form
    72,200.77/108,308.75 = 18,901.15/x
  3. Step 3: Cross multiply
    72,200.77x = 108,308.75 × 18,901.15
  4. Step 4: Simplify right side
    72,200.77x = 2,047,159,564.78
  5. Step 5: Solve for x
    x = 2,047,159,564.78/72,200.77
  6. Step 6: Final answer
    x = 28,353.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.