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Finding the Fourth Proportional to 154,505.79, 213,217.97 and 85,599.77

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Solution

The fourth proportional to 154,505.79, 213,217.97 and 85,599.77 is: 118,127.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,505.79 : 213,217.97 = 85,599.77 : x
  2. Step 2: Convert to fraction form
    154,505.79/213,217.97 = 85,599.77/x
  3. Step 3: Cross multiply
    154,505.79x = 213,217.97 × 85,599.77
  4. Step 4: Simplify right side
    154,505.79x = 18,251,407,697.78
  5. Step 5: Solve for x
    x = 18,251,407,697.78/154,505.79
  6. Step 6: Final answer
    x = 118,127.66

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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.