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Finding the Fourth Proportional to 154,349.35, 212,934.52 and 90,658.44

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Solution

The fourth proportional to 154,349.35, 212,934.52 and 90,658.44 is: 125,068.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,349.35 : 212,934.52 = 90,658.44 : x
  2. Step 2: Convert to fraction form
    154,349.35/212,934.52 = 90,658.44/x
  3. Step 3: Cross multiply
    154,349.35x = 212,934.52 × 90,658.44
  4. Step 4: Simplify right side
    154,349.35x = 19,304,311,518.67
  5. Step 5: Solve for x
    x = 19,304,311,518.67/154,349.35
  6. Step 6: Final answer
    x = 125,068.95

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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.