Home / 278,413.74-417,666.78-91,381.50

Finding the Fourth Proportional to 278,413.74, 417,666.78 and 91,381.50

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Solution

The fourth proportional to 278,413.74, 417,666.78 and 91,381.50 is: 137,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,413.74 : 417,666.78 = 91,381.50 : x
  2. Step 2: Convert to fraction form
    278,413.74/417,666.78 = 91,381.50/x
  3. Step 3: Cross multiply
    278,413.74x = 417,666.78 × 91,381.50
  4. Step 4: Simplify right side
    278,413.74x = 38,167,016,856.57
  5. Step 5: Solve for x
    x = 38,167,016,856.57/278,413.74
  6. Step 6: Final answer
    x = 137,087.40

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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.