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Finding the Fourth Proportional to 77,886.69, 107,413.07 and 51,019.40

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Solution

The fourth proportional to 77,886.69, 107,413.07 and 51,019.40 is: 70,360.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,886.69 : 107,413.07 = 51,019.40 : x
  2. Step 2: Convert to fraction form
    77,886.69/107,413.07 = 51,019.40/x
  3. Step 3: Cross multiply
    77,886.69x = 107,413.07 × 51,019.40
  4. Step 4: Simplify right side
    77,886.69x = 5,480,149,591.40
  5. Step 5: Solve for x
    x = 5,480,149,591.40/77,886.69
  6. Step 6: Final answer
    x = 70,360.54

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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.