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Finding the Fourth Proportional to 99,466.55, 149,145.29 and 39,434.21

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Solution

The fourth proportional to 99,466.55, 149,145.29 and 39,434.21 is: 59,129.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,466.55 : 149,145.29 = 39,434.21 : x
  2. Step 2: Convert to fraction form
    99,466.55/149,145.29 = 39,434.21/x
  3. Step 3: Cross multiply
    99,466.55x = 149,145.29 × 39,434.21
  4. Step 4: Simplify right side
    99,466.55x = 5,881,425,743.47
  5. Step 5: Solve for x
    x = 5,881,425,743.47/99,466.55
  6. Step 6: Final answer
    x = 59,129.69

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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.