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Finding the Fourth Proportional to 231,437.48, 319,413.30 and 129,468.60

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Solution

The fourth proportional to 231,437.48, 319,413.30 and 129,468.60 is: 178,683.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,437.48 : 319,413.30 = 129,468.60 : x
  2. Step 2: Convert to fraction form
    231,437.48/319,413.30 = 129,468.60/x
  3. Step 3: Cross multiply
    231,437.48x = 319,413.30 × 129,468.60
  4. Step 4: Simplify right side
    231,437.48x = 41,353,992,772.38
  5. Step 5: Solve for x
    x = 41,353,992,772.38/231,437.48
  6. Step 6: Final answer
    x = 178,683.21

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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.