Home / 138,933.29-191,702.70-81,575.10

Finding the Fourth Proportional to 138,933.29, 191,702.70 and 81,575.10

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Solution

The fourth proportional to 138,933.29, 191,702.70 and 81,575.10 is: 112,558.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,933.29 : 191,702.70 = 81,575.10 : x
  2. Step 2: Convert to fraction form
    138,933.29/191,702.70 = 81,575.10/x
  3. Step 3: Cross multiply
    138,933.29x = 191,702.70 × 81,575.10
  4. Step 4: Simplify right side
    138,933.29x = 15,638,166,922.77
  5. Step 5: Solve for x
    x = 15,638,166,922.77/138,933.29
  6. Step 6: Final answer
    x = 112,558.82

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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.