Home / 138,112.34-190,600.72-77,685.80

Finding the Fourth Proportional to 138,112.34, 190,600.72 and 77,685.80

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Solution

The fourth proportional to 138,112.34, 190,600.72 and 77,685.80 is: 107,209.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,112.34 : 190,600.72 = 77,685.80 : x
  2. Step 2: Convert to fraction form
    138,112.34/190,600.72 = 77,685.80/x
  3. Step 3: Cross multiply
    138,112.34x = 190,600.72 × 77,685.80
  4. Step 4: Simplify right side
    138,112.34x = 14,806,969,413.78
  5. Step 5: Solve for x
    x = 14,806,969,413.78/138,112.34
  6. Step 6: Final answer
    x = 107,209.60

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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.