Home / 153,698.25-212,103.18-85,715.30

Finding the Fourth Proportional to 153,698.25, 212,103.18 and 85,715.30

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Solution

The fourth proportional to 153,698.25, 212,103.18 and 85,715.30 is: 118,286.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,698.25 : 212,103.18 = 85,715.30 : x
  2. Step 2: Convert to fraction form
    153,698.25/212,103.18 = 85,715.30/x
  3. Step 3: Cross multiply
    153,698.25x = 212,103.18 × 85,715.30
  4. Step 4: Simplify right side
    153,698.25x = 18,180,488,234.91
  5. Step 5: Solve for x
    x = 18,180,488,234.91/153,698.25
  6. Step 6: Final answer
    x = 118,286.89

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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.