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Finding the Fourth Proportional to 290,062.77, 435,115.10 and 121,413.39

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Solution

The fourth proportional to 290,062.77, 435,115.10 and 121,413.39 is: 182,128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,062.77 : 435,115.10 = 121,413.39 : x
  2. Step 2: Convert to fraction form
    290,062.77/435,115.10 = 121,413.39/x
  3. Step 3: Cross multiply
    290,062.77x = 435,115.10 × 121,413.39
  4. Step 4: Simplify right side
    290,062.77x = 52,828,798,724.12
  5. Step 5: Solve for x
    x = 52,828,798,724.12/290,062.77
  6. Step 6: Final answer
    x = 182,128.85

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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.