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Finding the Fourth Proportional to 70,511.76, 105,777.54 and 20,595.52

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Solution

The fourth proportional to 70,511.76, 105,777.54 and 20,595.52 is: 30,896.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,511.76 : 105,777.54 = 20,595.52 : x
  2. Step 2: Convert to fraction form
    70,511.76/105,777.54 = 20,595.52/x
  3. Step 3: Cross multiply
    70,511.76x = 105,777.54 × 20,595.52
  4. Step 4: Simplify right side
    70,511.76x = 2,178,543,440.62
  5. Step 5: Solve for x
    x = 2,178,543,440.62/70,511.76
  6. Step 6: Final answer
    x = 30,896.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.