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Finding the Fourth Proportional to 99,419.60, 149,129.40 and 29,298.80

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Solution

The fourth proportional to 99,419.60, 149,129.40 and 29,298.80 is: 43,948.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,419.60 : 149,129.40 = 29,298.80 : x
  2. Step 2: Convert to fraction form
    99,419.60/149,129.40 = 29,298.80/x
  3. Step 3: Cross multiply
    99,419.60x = 149,129.40 × 29,298.80
  4. Step 4: Simplify right side
    99,419.60x = 4,369,312,464.72
  5. Step 5: Solve for x
    x = 4,369,312,464.72/99,419.60
  6. Step 6: Final answer
    x = 43,948.20

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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.