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Finding the Fourth Proportional to 129,526.54, 194,289.54 and 40,787.80

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Solution

The fourth proportional to 129,526.54, 194,289.54 and 40,787.80 is: 61,181.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,526.54 : 194,289.54 = 40,787.80 : x
  2. Step 2: Convert to fraction form
    129,526.54/194,289.54 = 40,787.80/x
  3. Step 3: Cross multiply
    129,526.54x = 194,289.54 × 40,787.80
  4. Step 4: Simplify right side
    129,526.54x = 7,924,642,899.61
  5. Step 5: Solve for x
    x = 7,924,642,899.61/129,526.54
  6. Step 6: Final answer
    x = 61,181.61

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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.