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Finding the Fourth Proportional to 98,112.70, 135,395.79 and 55,671.12

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Solution

The fourth proportional to 98,112.70, 135,395.79 and 55,671.12 is: 76,826.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,112.70 : 135,395.79 = 55,671.12 : x
  2. Step 2: Convert to fraction form
    98,112.70/135,395.79 = 55,671.12/x
  3. Step 3: Cross multiply
    98,112.70x = 135,395.79 × 55,671.12
  4. Step 4: Simplify right side
    98,112.70x = 7,537,635,272.58
  5. Step 5: Solve for x
    x = 7,537,635,272.58/98,112.70
  6. Step 6: Final answer
    x = 76,826.30

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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.