Home / 138,119.76-190,597.20-76,864.32

Finding the Fourth Proportional to 138,119.76, 190,597.20 and 76,864.32

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Solution

The fourth proportional to 138,119.76, 190,597.20 and 76,864.32 is: 106,068.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,119.76 : 190,597.20 = 76,864.32 : x
  2. Step 2: Convert to fraction form
    138,119.76/190,597.20 = 76,864.32/x
  3. Step 3: Cross multiply
    138,119.76x = 190,597.20 × 76,864.32
  4. Step 4: Simplify right side
    138,119.76x = 14,650,124,171.90
  5. Step 5: Solve for x
    x = 14,650,124,171.90/138,119.76
  6. Step 6: Final answer
    x = 106,068.27

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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.