Home / 138,293.12-190,828.74-77,862.21

Finding the Fourth Proportional to 138,293.12, 190,828.74 and 77,862.21

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Solution

The fourth proportional to 138,293.12, 190,828.74 and 77,862.21 is: 107,440.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,293.12 : 190,828.74 = 77,862.21 : x
  2. Step 2: Convert to fraction form
    138,293.12/190,828.74 = 77,862.21/x
  3. Step 3: Cross multiply
    138,293.12x = 190,828.74 × 77,862.21
  4. Step 4: Simplify right side
    138,293.12x = 14,858,347,420.74
  5. Step 5: Solve for x
    x = 14,858,347,420.74/138,293.12
  6. Step 6: Final answer
    x = 107,440.97

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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.