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Finding the Fourth Proportional to 72,171.46, 99,609.44 and 53,078.95

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Solution

The fourth proportional to 72,171.46, 99,609.44 and 53,078.95 is: 73,258.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,171.46 : 99,609.44 = 53,078.95 : x
  2. Step 2: Convert to fraction form
    72,171.46/99,609.44 = 53,078.95/x
  3. Step 3: Cross multiply
    72,171.46x = 99,609.44 × 53,078.95
  4. Step 4: Simplify right side
    72,171.46x = 5,287,164,485.29
  5. Step 5: Solve for x
    x = 5,287,164,485.29/72,171.46
  6. Step 6: Final answer
    x = 73,258.38

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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.