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Finding the Fourth Proportional to 231,595.80, 319,607.94 and 129,620.40

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Solution

The fourth proportional to 231,595.80, 319,607.94 and 129,620.40 is: 178,879.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,595.80 : 319,607.94 = 129,620.40 : x
  2. Step 2: Convert to fraction form
    231,595.80/319,607.94 = 129,620.40/x
  3. Step 3: Cross multiply
    231,595.80x = 319,607.94 × 129,620.40
  4. Step 4: Simplify right side
    231,595.80x = 41,427,709,025.98
  5. Step 5: Solve for x
    x = 41,427,709,025.98/231,595.80
  6. Step 6: Final answer
    x = 178,879.36

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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.