Home / 101,835.06-140,669.40-78,256.50

Finding the Fourth Proportional to 101,835.06, 140,669.40 and 78,256.50

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Solution

The fourth proportional to 101,835.06, 140,669.40 and 78,256.50 is: 108,099.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,835.06 : 140,669.40 = 78,256.50 : x
  2. Step 2: Convert to fraction form
    101,835.06/140,669.40 = 78,256.50/x
  3. Step 3: Cross multiply
    101,835.06x = 140,669.40 × 78,256.50
  4. Step 4: Simplify right side
    101,835.06x = 11,008,294,901.10
  5. Step 5: Solve for x
    x = 11,008,294,901.10/101,835.06
  6. Step 6: Final answer
    x = 108,099.26

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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.