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Finding the Fourth Proportional to 188,890.78, 260,673.78 and 102,854.20

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Solution

The fourth proportional to 188,890.78, 260,673.78 and 102,854.20 is: 141,941.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,890.78 : 260,673.78 = 102,854.20 : x
  2. Step 2: Convert to fraction form
    188,890.78/260,673.78 = 102,854.20/x
  3. Step 3: Cross multiply
    188,890.78x = 260,673.78 × 102,854.20
  4. Step 4: Simplify right side
    188,890.78x = 26,811,393,102.88
  5. Step 5: Solve for x
    x = 26,811,393,102.88/188,890.78
  6. Step 6: Final answer
    x = 141,941.25

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1.5x scale

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.