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Finding the Fourth Proportional to 154,915.61, 213,770.75 and 109,620.14

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Solution

The fourth proportional to 154,915.61, 213,770.75 and 109,620.14 is: 151,266.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,915.61 : 213,770.75 = 109,620.14 : x
  2. Step 2: Convert to fraction form
    154,915.61/213,770.75 = 109,620.14/x
  3. Step 3: Cross multiply
    154,915.61x = 213,770.75 × 109,620.14
  4. Step 4: Simplify right side
    154,915.61x = 23,433,577,925.95
  5. Step 5: Solve for x
    x = 23,433,577,925.95/154,915.61
  6. Step 6: Final answer
    x = 151,266.74

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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.