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Finding the Fourth Proportional to 101,432.56, 139,976.12 and 56,720.56

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Solution

The fourth proportional to 101,432.56, 139,976.12 and 56,720.56 is: 78,273.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,432.56 : 139,976.12 = 56,720.56 : x
  2. Step 2: Convert to fraction form
    101,432.56/139,976.12 = 56,720.56/x
  3. Step 3: Cross multiply
    101,432.56x = 139,976.12 × 56,720.56
  4. Step 4: Simplify right side
    101,432.56x = 7,939,523,913.03
  5. Step 5: Solve for x
    x = 7,939,523,913.03/101,432.56
  6. Step 6: Final answer
    x = 78,273.92

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1.5x scale

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.