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Finding the Fourth Proportional to 256,835.20, 385,137.60 and 116,521.60

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Solution

The fourth proportional to 256,835.20, 385,137.60 and 116,521.60 is: 174,730.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,835.20 : 385,137.60 = 116,521.60 : x
  2. Step 2: Convert to fraction form
    256,835.20/385,137.60 = 116,521.60/x
  3. Step 3: Cross multiply
    256,835.20x = 385,137.60 × 116,521.60
  4. Step 4: Simplify right side
    256,835.20x = 44,876,849,372.16
  5. Step 5: Solve for x
    x = 44,876,849,372.16/256,835.20
  6. Step 6: Final answer
    x = 174,730.14

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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.