Home / 138,126.70-190,612.91-77,697.35

Finding the Fourth Proportional to 138,126.70, 190,612.91 and 77,697.35

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Solution

The fourth proportional to 138,126.70, 190,612.91 and 77,697.35 is: 107,221.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,126.70 : 190,612.91 = 77,697.35 : x
  2. Step 2: Convert to fraction form
    138,126.70/190,612.91 = 77,697.35/x
  3. Step 3: Cross multiply
    138,126.70x = 190,612.91 × 77,697.35
  4. Step 4: Simplify right side
    138,126.70x = 14,810,117,982.79
  5. Step 5: Solve for x
    x = 14,810,117,982.79/138,126.70
  6. Step 6: Final answer
    x = 107,221.25

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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.