Home / 101,129.19-139,499.35-64,817.70

Finding the Fourth Proportional to 101,129.19, 139,499.35 and 64,817.70

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Solution

The fourth proportional to 101,129.19, 139,499.35 and 64,817.70 is: 89,410.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,129.19 : 139,499.35 = 64,817.70 : x
  2. Step 2: Convert to fraction form
    101,129.19/139,499.35 = 64,817.70/x
  3. Step 3: Cross multiply
    101,129.19x = 139,499.35 × 64,817.70
  4. Step 4: Simplify right side
    101,129.19x = 9,042,026,333.33
  5. Step 5: Solve for x
    x = 9,042,026,333.33/101,129.19
  6. Step 6: Final answer
    x = 89,410.65

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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.