Home / 137,908.47-190,321.80-103,856.88

Finding the Fourth Proportional to 137,908.47, 190,321.80 and 103,856.88

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Solution

The fourth proportional to 137,908.47, 190,321.80 and 103,856.88 is: 143,328.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,908.47 : 190,321.80 = 103,856.88 : x
  2. Step 2: Convert to fraction form
    137,908.47/190,321.80 = 103,856.88/x
  3. Step 3: Cross multiply
    137,908.47x = 190,321.80 × 103,856.88
  4. Step 4: Simplify right side
    137,908.47x = 19,766,228,343.98
  5. Step 5: Solve for x
    x = 19,766,228,343.98/137,908.47
  6. Step 6: Final answer
    x = 143,328.60

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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.