Home / 138,126.54-190,560.65-77,683.32

Finding the Fourth Proportional to 138,126.54, 190,560.65 and 77,683.32

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Solution

The fourth proportional to 138,126.54, 190,560.65 and 77,683.32 is: 107,172.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,126.54 : 190,560.65 = 77,683.32 : x
  2. Step 2: Convert to fraction form
    138,126.54/190,560.65 = 77,683.32/x
  3. Step 3: Cross multiply
    138,126.54x = 190,560.65 × 77,683.32
  4. Step 4: Simplify right side
    138,126.54x = 14,803,383,564.94
  5. Step 5: Solve for x
    x = 14,803,383,564.94/138,126.54
  6. Step 6: Final answer
    x = 107,172.62

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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.