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Finding the Fourth Proportional to 251,650, 377,533.32 and 85,438

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Solution

The fourth proportional to 251,650, 377,533.32 and 85,438 is: 128,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,650 : 377,533.32 = 85,438 : x
  2. Step 2: Convert to fraction form
    251,650/377,533.32 = 85,438/x
  3. Step 3: Cross multiply
    251,650x = 377,533.32 × 85,438
  4. Step 4: Simplify right side
    251,650x = 32,255,691,794.16
  5. Step 5: Solve for x
    x = 32,255,691,794.16/251,650
  6. Step 6: Final answer
    x = 128,176.80

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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.