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Finding the Fourth Proportional to 168,413.40, 252,911.70 and 89,681.40

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Solution

The fourth proportional to 168,413.40, 252,911.70 and 89,681.40 is: 134,677.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,413.40 : 252,911.70 = 89,681.40 : x
  2. Step 2: Convert to fraction form
    168,413.40/252,911.70 = 89,681.40/x
  3. Step 3: Cross multiply
    168,413.40x = 252,911.70 × 89,681.40
  4. Step 4: Simplify right side
    168,413.40x = 22,681,475,332.38
  5. Step 5: Solve for x
    x = 22,681,475,332.38/168,413.40
  6. Step 6: Final answer
    x = 134,677.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.