Home / 208,205.40-312,308.10-89,794.20

Finding the Fourth Proportional to 208,205.40, 312,308.10 and 89,794.20

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Solution

The fourth proportional to 208,205.40, 312,308.10 and 89,794.20 is: 134,691.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,205.40 : 312,308.10 = 89,794.20 : x
  2. Step 2: Convert to fraction form
    208,205.40/312,308.10 = 89,794.20/x
  3. Step 3: Cross multiply
    208,205.40x = 312,308.10 × 89,794.20
  4. Step 4: Simplify right side
    208,205.40x = 28,043,455,993.02
  5. Step 5: Solve for x
    x = 28,043,455,993.02/208,205.40
  6. Step 6: Final answer
    x = 134,691.30

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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.