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Finding the Fourth Proportional to 98,137.20, 147,205.80 and 90,920.10

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Solution

The fourth proportional to 98,137.20, 147,205.80 and 90,920.10 is: 136,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,137.20 : 147,205.80 = 90,920.10 : x
  2. Step 2: Convert to fraction form
    98,137.20/147,205.80 = 90,920.10/x
  3. Step 3: Cross multiply
    98,137.20x = 147,205.80 × 90,920.10
  4. Step 4: Simplify right side
    98,137.20x = 13,383,966,056.58
  5. Step 5: Solve for x
    x = 13,383,966,056.58/98,137.20
  6. Step 6: Final answer
    x = 136,380.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.