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Finding the Fourth Proportional to 99,586.70, 149,376.45 and 40,420.70

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Solution

The fourth proportional to 99,586.70, 149,376.45 and 40,420.70 is: 60,629.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,586.70 : 149,376.45 = 40,420.70 : x
  2. Step 2: Convert to fraction form
    99,586.70/149,376.45 = 40,420.70/x
  3. Step 3: Cross multiply
    99,586.70x = 149,376.45 × 40,420.70
  4. Step 4: Simplify right side
    99,586.70x = 6,037,900,672.52
  5. Step 5: Solve for x
    x = 6,037,900,672.52/99,586.70
  6. Step 6: Final answer
    x = 60,629.59

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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.