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Finding the Fourth Proportional to 256,117.90, 384,176.85 and 89,905.90

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Solution

The fourth proportional to 256,117.90, 384,176.85 and 89,905.90 is: 134,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,117.90 : 384,176.85 = 89,905.90 : x
  2. Step 2: Convert to fraction form
    256,117.90/384,176.85 = 89,905.90/x
  3. Step 3: Cross multiply
    256,117.90x = 384,176.85 × 89,905.90
  4. Step 4: Simplify right side
    256,117.90x = 34,539,765,458.42
  5. Step 5: Solve for x
    x = 34,539,765,458.42/256,117.90
  6. Step 6: Final answer
    x = 134,858.85

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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.