Home / 137,912.47-190,338.39-77,487.78

Finding the Fourth Proportional to 137,912.47, 190,338.39 and 77,487.78

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Solution

The fourth proportional to 137,912.47, 190,338.39 and 77,487.78 is: 106,943.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,912.47 : 190,338.39 = 77,487.78 : x
  2. Step 2: Convert to fraction form
    137,912.47/190,338.39 = 77,487.78/x
  3. Step 3: Cross multiply
    137,912.47x = 190,338.39 × 77,487.78
  4. Step 4: Simplify right side
    137,912.47x = 14,748,900,003.64
  5. Step 5: Solve for x
    x = 14,748,900,003.64/137,912.47
  6. Step 6: Final answer
    x = 106,943.92

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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.