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Finding the Fourth Proportional to 285,087.41, 427,645.35 and 85,388.77

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Solution

The fourth proportional to 285,087.41, 427,645.35 and 85,388.77 is: 128,087.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,087.41 : 427,645.35 = 85,388.77 : x
  2. Step 2: Convert to fraction form
    285,087.41/427,645.35 = 85,388.77/x
  3. Step 3: Cross multiply
    285,087.41x = 427,645.35 × 85,388.77
  4. Step 4: Simplify right side
    285,087.41x = 36,516,110,125.74
  5. Step 5: Solve for x
    x = 36,516,110,125.74/285,087.41
  6. Step 6: Final answer
    x = 128,087.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.