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Finding the Fourth Proportional to 172,890.88, 238,612.80 and 101,299.48

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Solution

The fourth proportional to 172,890.88, 238,612.80 and 101,299.48 is: 139,806.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,890.88 : 238,612.80 = 101,299.48 : x
  2. Step 2: Convert to fraction form
    172,890.88/238,612.80 = 101,299.48/x
  3. Step 3: Cross multiply
    172,890.88x = 238,612.80 × 101,299.48
  4. Step 4: Simplify right side
    172,890.88x = 24,171,352,561.34
  5. Step 5: Solve for x
    x = 24,171,352,561.34/172,890.88
  6. Step 6: Final answer
    x = 139,806.98

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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.