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Finding the Fourth Proportional to 172,563.42, 238,120.53 and 100,929.45

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Solution

The fourth proportional to 172,563.42, 238,120.53 and 100,929.45 is: 139,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,563.42 : 238,120.53 = 100,929.45 : x
  2. Step 2: Convert to fraction form
    172,563.42/238,120.53 = 100,929.45/x
  3. Step 3: Cross multiply
    172,563.42x = 238,120.53 × 100,929.45
  4. Step 4: Simplify right side
    172,563.42x = 24,033,374,126.61
  5. Step 5: Solve for x
    x = 24,033,374,126.61/172,563.42
  6. Step 6: Final answer
    x = 139,272.70

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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.