Home / 138,150.07-190,639.30-77,723.26

Finding the Fourth Proportional to 138,150.07, 190,639.30 and 77,723.26

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Solution

The fourth proportional to 138,150.07, 190,639.30 and 77,723.26 is: 107,253.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,150.07 : 190,639.30 = 77,723.26 : x
  2. Step 2: Convert to fraction form
    138,150.07/190,639.30 = 77,723.26/x
  3. Step 3: Cross multiply
    138,150.07x = 190,639.30 × 77,723.26
  4. Step 4: Simplify right side
    138,150.07x = 14,817,107,880.12
  5. Step 5: Solve for x
    x = 14,817,107,880.12/138,150.07
  6. Step 6: Final answer
    x = 107,253.71

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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.