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Finding the Fourth Proportional to 70,624.80, 105,938.88 and 20,706.24

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Solution

The fourth proportional to 70,624.80, 105,938.88 and 20,706.24 is: 31,059.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,624.80 : 105,938.88 = 20,706.24 : x
  2. Step 2: Convert to fraction form
    70,624.80/105,938.88 = 20,706.24/x
  3. Step 3: Cross multiply
    70,624.80x = 105,938.88 × 20,706.24
  4. Step 4: Simplify right side
    70,624.80x = 2,193,595,874.61
  5. Step 5: Solve for x
    x = 2,193,595,874.61/70,624.80
  6. Step 6: Final answer
    x = 31,059.85

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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.