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Finding the Fourth Proportional to 153,874.70, 212,309.69 and 90,200.20

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Solution

The fourth proportional to 153,874.70, 212,309.69 and 90,200.20 is: 124,454.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,874.70 : 212,309.69 = 90,200.20 : x
  2. Step 2: Convert to fraction form
    153,874.70/212,309.69 = 90,200.20/x
  3. Step 3: Cross multiply
    153,874.70x = 212,309.69 × 90,200.20
  4. Step 4: Simplify right side
    153,874.70x = 19,150,375,337.67
  5. Step 5: Solve for x
    x = 19,150,375,337.67/153,874.70
  6. Step 6: Final answer
    x = 124,454.35

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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.