Home / 138,028.68-190,478.42-77,599.60

Finding the Fourth Proportional to 138,028.68, 190,478.42 and 77,599.60

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Solution

The fourth proportional to 138,028.68, 190,478.42 and 77,599.60 is: 107,086.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,028.68 : 190,478.42 = 77,599.60 : x
  2. Step 2: Convert to fraction form
    138,028.68/190,478.42 = 77,599.60/x
  3. Step 3: Cross multiply
    138,028.68x = 190,478.42 × 77,599.60
  4. Step 4: Simplify right side
    138,028.68x = 14,781,049,200.63
  5. Step 5: Solve for x
    x = 14,781,049,200.63/138,028.68
  6. Step 6: Final answer
    x = 107,086.80

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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.