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Finding the Fourth Proportional to 188,456.87, 260,131.08 and 120,656.45

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Solution

The fourth proportional to 188,456.87, 260,131.08 and 120,656.45 is: 166,544.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,456.87 : 260,131.08 = 120,656.45 : x
  2. Step 2: Convert to fraction form
    188,456.87/260,131.08 = 120,656.45/x
  3. Step 3: Cross multiply
    188,456.87x = 260,131.08 × 120,656.45
  4. Step 4: Simplify right side
    188,456.87x = 31,386,492,647.47
  5. Step 5: Solve for x
    x = 31,386,492,647.47/188,456.87
  6. Step 6: Final answer
    x = 166,544.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.