Home / 138,068.25-190,535.31-77,638.37

Finding the Fourth Proportional to 138,068.25, 190,535.31 and 77,638.37

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Solution

The fourth proportional to 138,068.25, 190,535.31 and 77,638.37 is: 107,141.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,068.25 : 190,535.31 = 77,638.37 : x
  2. Step 2: Convert to fraction form
    138,068.25/190,535.31 = 77,638.37/x
  3. Step 3: Cross multiply
    138,068.25x = 190,535.31 × 77,638.37
  4. Step 4: Simplify right side
    138,068.25x = 14,792,849,943.17
  5. Step 5: Solve for x
    x = 14,792,849,943.17/138,068.25
  6. Step 6: Final answer
    x = 107,141.58

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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.