Home / 138,133.04-190,605.66-77,701.64

Finding the Fourth Proportional to 138,133.04, 190,605.66 and 77,701.64

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Solution

The fourth proportional to 138,133.04, 190,605.66 and 77,701.64 is: 107,218.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,133.04 : 190,605.66 = 77,701.64 : x
  2. Step 2: Convert to fraction form
    138,133.04/190,605.66 = 77,701.64/x
  3. Step 3: Cross multiply
    138,133.04x = 190,605.66 × 77,701.64
  4. Step 4: Simplify right side
    138,133.04x = 14,810,372,375.28
  5. Step 5: Solve for x
    x = 14,810,372,375.28/138,133.04
  6. Step 6: Final answer
    x = 107,218.17

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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.