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Finding the Fourth Proportional to 101,293.50, 139,785.03 and 56,581.50

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Solution

The fourth proportional to 101,293.50, 139,785.03 and 56,581.50 is: 78,082.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,293.50 : 139,785.03 = 56,581.50 : x
  2. Step 2: Convert to fraction form
    101,293.50/139,785.03 = 56,581.50/x
  3. Step 3: Cross multiply
    101,293.50x = 139,785.03 × 56,581.50
  4. Step 4: Simplify right side
    101,293.50x = 7,909,246,674.95
  5. Step 5: Solve for x
    x = 7,909,246,674.95/101,293.50
  6. Step 6: Final answer
    x = 78,082.47

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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.