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Finding the Fourth Proportional to 125,873.10, 188,809.65 and 72,656.10

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Solution

The fourth proportional to 125,873.10, 188,809.65 and 72,656.10 is: 108,984.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,873.10 : 188,809.65 = 72,656.10 : x
  2. Step 2: Convert to fraction form
    125,873.10/188,809.65 = 72,656.10/x
  3. Step 3: Cross multiply
    125,873.10x = 188,809.65 × 72,656.10
  4. Step 4: Simplify right side
    125,873.10x = 13,718,172,811.37
  5. Step 5: Solve for x
    x = 13,718,172,811.37/125,873.10
  6. Step 6: Final answer
    x = 108,984.15

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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.