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Finding the Fourth Proportional to 70,207.80, 105,311.70 and 69,770.40

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Solution

The fourth proportional to 70,207.80, 105,311.70 and 69,770.40 is: 104,655.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,207.80 : 105,311.70 = 69,770.40 : x
  2. Step 2: Convert to fraction form
    70,207.80/105,311.70 = 69,770.40/x
  3. Step 3: Cross multiply
    70,207.80x = 105,311.70 × 69,770.40
  4. Step 4: Simplify right side
    70,207.80x = 7,347,639,433.68
  5. Step 5: Solve for x
    x = 7,347,639,433.68/70,207.80
  6. Step 6: Final answer
    x = 104,655.60

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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.