Home / 138,150.69-190,640.16-77,723.88

Finding the Fourth Proportional to 138,150.69, 190,640.16 and 77,723.88

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Solution

The fourth proportional to 138,150.69, 190,640.16 and 77,723.88 is: 107,254.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,150.69 : 190,640.16 = 77,723.88 : x
  2. Step 2: Convert to fraction form
    138,150.69/190,640.16 = 77,723.88/x
  3. Step 3: Cross multiply
    138,150.69x = 190,640.16 × 77,723.88
  4. Step 4: Simplify right side
    138,150.69x = 14,817,292,919.02
  5. Step 5: Solve for x
    x = 14,817,292,919.02/138,150.69
  6. Step 6: Final answer
    x = 107,254.57

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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.