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Finding the Fourth Proportional to 231,437.76, 319,413.68 and 129,468.88

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Solution

The fourth proportional to 231,437.76, 319,413.68 and 129,468.88 is: 178,683.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,437.76 : 319,413.68 = 129,468.88 : x
  2. Step 2: Convert to fraction form
    231,437.76/319,413.68 = 129,468.88/x
  3. Step 3: Cross multiply
    231,437.76x = 319,413.68 × 129,468.88
  4. Step 4: Simplify right side
    231,437.76x = 41,354,131,406.28
  5. Step 5: Solve for x
    x = 41,354,131,406.28/231,437.76
  6. Step 6: Final answer
    x = 178,683.60

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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.