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Finding the Fourth Proportional to 108,785.41, 150,123.72 and 61,043.20

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Solution

The fourth proportional to 108,785.41, 150,123.72 and 61,043.20 is: 84,239.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,785.41 : 150,123.72 = 61,043.20 : x
  2. Step 2: Convert to fraction form
    108,785.41/150,123.72 = 61,043.20/x
  3. Step 3: Cross multiply
    108,785.41x = 150,123.72 × 61,043.20
  4. Step 4: Simplify right side
    108,785.41x = 9,164,032,264.70
  5. Step 5: Solve for x
    x = 9,164,032,264.70/108,785.41
  6. Step 6: Final answer
    x = 84,239.53

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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.