Home / 138,086.57-190,557.66-77,657.20

Finding the Fourth Proportional to 138,086.57, 190,557.66 and 77,657.20

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Solution

The fourth proportional to 138,086.57, 190,557.66 and 77,657.20 is: 107,165.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,086.57 : 190,557.66 = 77,657.20 : x
  2. Step 2: Convert to fraction form
    138,086.57/190,557.66 = 77,657.20/x
  3. Step 3: Cross multiply
    138,086.57x = 190,557.66 × 77,657.20
  4. Step 4: Simplify right side
    138,086.57x = 14,798,174,128.97
  5. Step 5: Solve for x
    x = 14,798,174,128.97/138,086.57
  6. Step 6: Final answer
    x = 107,165.92

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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.