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Finding the Fourth Proportional to 125,895.60, 188,843.40 and 72,678.60

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Solution

The fourth proportional to 125,895.60, 188,843.40 and 72,678.60 is: 109,017.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,895.60 : 188,843.40 = 72,678.60 : x
  2. Step 2: Convert to fraction form
    125,895.60/188,843.40 = 72,678.60/x
  3. Step 3: Cross multiply
    125,895.60x = 188,843.40 × 72,678.60
  4. Step 4: Simplify right side
    125,895.60x = 13,724,873,931.24
  5. Step 5: Solve for x
    x = 13,724,873,931.24/125,895.60
  6. Step 6: Final answer
    x = 109,017.90

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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.