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Finding the Fourth Proportional to 101,856.57, 140,559.95 and 56,531.90

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Solution

The fourth proportional to 101,856.57, 140,559.95 and 56,531.90 is: 78,012.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,856.57 : 140,559.95 = 56,531.90 : x
  2. Step 2: Convert to fraction form
    101,856.57/140,559.95 = 56,531.90/x
  3. Step 3: Cross multiply
    101,856.57x = 140,559.95 × 56,531.90
  4. Step 4: Simplify right side
    101,856.57x = 7,946,120,475.93
  5. Step 5: Solve for x
    x = 7,946,120,475.93/101,856.57
  6. Step 6: Final answer
    x = 78,012.84

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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.