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Finding the Fourth Proportional to 108,959.40, 150,377.98 and 61,212.80

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Solution

The fourth proportional to 108,959.40, 150,377.98 and 61,212.80 is: 84,481.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,959.40 : 150,377.98 = 61,212.80 : x
  2. Step 2: Convert to fraction form
    108,959.40/150,377.98 = 61,212.80/x
  3. Step 3: Cross multiply
    108,959.40x = 150,377.98 × 61,212.80
  4. Step 4: Simplify right side
    108,959.40x = 9,205,057,214.14
  5. Step 5: Solve for x
    x = 9,205,057,214.14/108,959.40
  6. Step 6: Final answer
    x = 84,481.53

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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.