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Finding the Fourth Proportional to 172,719.61, 259,088.69 and 54,400.21

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Solution

The fourth proportional to 172,719.61, 259,088.69 and 54,400.21 is: 81,603.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,719.61 : 259,088.69 = 54,400.21 : x
  2. Step 2: Convert to fraction form
    172,719.61/259,088.69 = 54,400.21/x
  3. Step 3: Cross multiply
    172,719.61x = 259,088.69 × 54,400.21
  4. Step 4: Simplify right side
    172,719.61x = 14,094,478,632.90
  5. Step 5: Solve for x
    x = 14,094,478,632.90/172,719.61
  6. Step 6: Final answer
    x = 81,603.23

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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.