Home / 135,413.26-186,869-78,031.50

Finding the Fourth Proportional to 135,413.26, 186,869 and 78,031.50

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Solution

The fourth proportional to 135,413.26, 186,869 and 78,031.50 is: 107,682.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,413.26 : 186,869 = 78,031.50 : x
  2. Step 2: Convert to fraction form
    135,413.26/186,869 = 78,031.50/x
  3. Step 3: Cross multiply
    135,413.26x = 186,869 × 78,031.50
  4. Step 4: Simplify right side
    135,413.26x = 14,581,668,373.50
  5. Step 5: Solve for x
    x = 14,581,668,373.50/135,413.26
  6. Step 6: Final answer
    x = 107,682.72

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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.