Home / 138,702.11-191,427.10-102,994.07

Finding the Fourth Proportional to 138,702.11, 191,427.10 and 102,994.07

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Solution

The fourth proportional to 138,702.11, 191,427.10 and 102,994.07 is: 142,145.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,702.11 : 191,427.10 = 102,994.07 : x
  2. Step 2: Convert to fraction form
    138,702.11/191,427.10 = 102,994.07/x
  3. Step 3: Cross multiply
    138,702.11x = 191,427.10 × 102,994.07
  4. Step 4: Simplify right side
    138,702.11x = 19,715,854,922.68
  5. Step 5: Solve for x
    x = 19,715,854,922.68/138,702.11
  6. Step 6: Final answer
    x = 142,145.32

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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.