Home / 138,703.11-191,428.48-102,995.07

Finding the Fourth Proportional to 138,703.11, 191,428.48 and 102,995.07

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Solution

The fourth proportional to 138,703.11, 191,428.48 and 102,995.07 is: 142,146.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,703.11 : 191,428.48 = 102,995.07 : x
  2. Step 2: Convert to fraction form
    138,703.11/191,428.48 = 102,995.07/x
  3. Step 3: Cross multiply
    138,703.11x = 191,428.48 × 102,995.07
  4. Step 4: Simplify right side
    138,703.11x = 19,716,189,697.59
  5. Step 5: Solve for x
    x = 19,716,189,697.59/138,703.11
  6. Step 6: Final answer
    x = 142,146.70

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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.