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Finding the Fourth Proportional to 125,921.10, 188,881.65 and 72,704.10

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Solution

The fourth proportional to 125,921.10, 188,881.65 and 72,704.10 is: 109,056.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,921.10 : 188,881.65 = 72,704.10 : x
  2. Step 2: Convert to fraction form
    125,921.10/188,881.65 = 72,704.10/x
  3. Step 3: Cross multiply
    125,921.10x = 188,881.65 × 72,704.10
  4. Step 4: Simplify right side
    125,921.10x = 13,732,470,369.77
  5. Step 5: Solve for x
    x = 13,732,470,369.77/125,921.10
  6. Step 6: Final answer
    x = 109,056.15

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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.