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Finding the Fourth Proportional to 138,576.92, 191,266.76 and 90,094.47

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Solution

The fourth proportional to 138,576.92, 191,266.76 and 90,094.47 is: 124,350.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,576.92 : 191,266.76 = 90,094.47 : x
  2. Step 2: Convert to fraction form
    138,576.92/191,266.76 = 90,094.47/x
  3. Step 3: Cross multiply
    138,576.92x = 191,266.76 × 90,094.47
  4. Step 4: Simplify right side
    138,576.92x = 17,232,076,920.34
  5. Step 5: Solve for x
    x = 17,232,076,920.34/138,576.92
  6. Step 6: Final answer
    x = 124,350.27

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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.