Home / 108,789.12-150,128.64-61,042.68

Finding the Fourth Proportional to 108,789.12, 150,128.64 and 61,042.68

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Solution

The fourth proportional to 108,789.12, 150,128.64 and 61,042.68 is: 84,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,789.12 : 150,128.64 = 61,042.68 : x
  2. Step 2: Convert to fraction form
    108,789.12/150,128.64 = 61,042.68/x
  3. Step 3: Cross multiply
    108,789.12x = 150,128.64 × 61,042.68
  4. Step 4: Simplify right side
    108,789.12x = 9,164,254,530.36
  5. Step 5: Solve for x
    x = 9,164,254,530.36/108,789.12
  6. Step 6: Final answer
    x = 84,238.70

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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.