Home / 138,416.12-190,815.18-98,603

Finding the Fourth Proportional to 138,416.12, 190,815.18 and 98,603

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Solution

The fourth proportional to 138,416.12, 190,815.18 and 98,603 is: 135,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,416.12 : 190,815.18 = 98,603 : x
  2. Step 2: Convert to fraction form
    138,416.12/190,815.18 = 98,603/x
  3. Step 3: Cross multiply
    138,416.12x = 190,815.18 × 98,603
  4. Step 4: Simplify right side
    138,416.12x = 18,814,949,193.54
  5. Step 5: Solve for x
    x = 18,814,949,193.54/138,416.12
  6. Step 6: Final answer
    x = 135,930.33

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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.