Home / 138,163.25-190,665.29-78,547.25

Finding the Fourth Proportional to 138,163.25, 190,665.29 and 78,547.25

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Solution

The fourth proportional to 138,163.25, 190,665.29 and 78,547.25 is: 108,395.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,163.25 : 190,665.29 = 78,547.25 : x
  2. Step 2: Convert to fraction form
    138,163.25/190,665.29 = 78,547.25/x
  3. Step 3: Cross multiply
    138,163.25x = 190,665.29 × 78,547.25
  4. Step 4: Simplify right side
    138,163.25x = 14,976,234,199.95
  5. Step 5: Solve for x
    x = 14,976,234,199.95/138,163.25
  6. Step 6: Final answer
    x = 108,395.21

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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.