Home / 138,321.03-190,881.13-77,892.40

Finding the Fourth Proportional to 138,321.03, 190,881.13 and 77,892.40

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Solution

The fourth proportional to 138,321.03, 190,881.13 and 77,892.40 is: 107,490.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,321.03 : 190,881.13 = 77,892.40 : x
  2. Step 2: Convert to fraction form
    138,321.03/190,881.13 = 77,892.40/x
  3. Step 3: Cross multiply
    138,321.03x = 190,881.13 × 77,892.40
  4. Step 4: Simplify right side
    138,321.03x = 14,868,189,330.41
  5. Step 5: Solve for x
    x = 14,868,189,330.41/138,321.03
  6. Step 6: Final answer
    x = 107,490.45

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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.