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Finding the Fourth Proportional to 172,670.32, 259,040.61 and 72,830.87

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Solution

The fourth proportional to 172,670.32, 259,040.61 and 72,830.87 is: 109,261.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,670.32 : 259,040.61 = 72,830.87 : x
  2. Step 2: Convert to fraction form
    172,670.32/259,040.61 = 72,830.87/x
  3. Step 3: Cross multiply
    172,670.32x = 259,040.61 × 72,830.87
  4. Step 4: Simplify right side
    172,670.32x = 18,866,152,991.63
  5. Step 5: Solve for x
    x = 18,866,152,991.63/172,670.32
  6. Step 6: Final answer
    x = 109,261.12

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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.