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Finding the Fourth Proportional to 188,456.38, 260,130.40 and 120,655.96

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Solution

The fourth proportional to 188,456.38, 260,130.40 and 120,655.96 is: 166,544.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,456.38 : 260,130.40 = 120,655.96 : x
  2. Step 2: Convert to fraction form
    188,456.38/260,130.40 = 120,655.96/x
  3. Step 3: Cross multiply
    188,456.38x = 260,130.40 × 120,655.96
  4. Step 4: Simplify right side
    188,456.38x = 31,386,283,137.18
  5. Step 5: Solve for x
    x = 31,386,283,137.18/188,456.38
  6. Step 6: Final answer
    x = 166,544.02

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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.