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Finding the Fourth Proportional to 172,115.69, 258,274.58 and 72,268.20

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Solution

The fourth proportional to 172,115.69, 258,274.58 and 72,268.20 is: 108,444.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,115.69 : 258,274.58 = 72,268.20 : x
  2. Step 2: Convert to fraction form
    172,115.69/258,274.58 = 72,268.20/x
  3. Step 3: Cross multiply
    172,115.69x = 258,274.58 × 72,268.20
  4. Step 4: Simplify right side
    172,115.69x = 18,665,038,641.02
  5. Step 5: Solve for x
    x = 18,665,038,641.02/172,115.69
  6. Step 6: Final answer
    x = 108,444.73

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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.