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Finding the Fourth Proportional to 101,212.28, 139,640.46 and 56,491.64

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Solution

The fourth proportional to 101,212.28, 139,640.46 and 56,491.64 is: 77,940.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,212.28 : 139,640.46 = 56,491.64 : x
  2. Step 2: Convert to fraction form
    101,212.28/139,640.46 = 56,491.64/x
  3. Step 3: Cross multiply
    101,212.28x = 139,640.46 × 56,491.64
  4. Step 4: Simplify right side
    101,212.28x = 7,888,518,595.75
  5. Step 5: Solve for x
    x = 7,888,518,595.75/101,212.28
  6. Step 6: Final answer
    x = 77,940.33

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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.