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Finding the Fourth Proportional to 117,871.66, 162,666.41 and 72,575.78

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Solution

The fourth proportional to 117,871.66, 162,666.41 and 72,575.78 is: 100,156.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,871.66 : 162,666.41 = 72,575.78 : x
  2. Step 2: Convert to fraction form
    117,871.66/162,666.41 = 72,575.78/x
  3. Step 3: Cross multiply
    117,871.66x = 162,666.41 × 72,575.78
  4. Step 4: Simplify right side
    117,871.66x = 11,805,640,953.66
  5. Step 5: Solve for x
    x = 11,805,640,953.66/117,871.66
  6. Step 6: Final answer
    x = 100,156.74

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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.