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Finding the Fourth Proportional to 70,513.80, 105,770.70 and 67,403.40

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Solution

The fourth proportional to 70,513.80, 105,770.70 and 67,403.40 is: 101,105.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,513.80 : 105,770.70 = 67,403.40 : x
  2. Step 2: Convert to fraction form
    70,513.80/105,770.70 = 67,403.40/x
  3. Step 3: Cross multiply
    70,513.80x = 105,770.70 × 67,403.40
  4. Step 4: Simplify right side
    70,513.80x = 7,129,304,800.38
  5. Step 5: Solve for x
    x = 7,129,304,800.38/70,513.80
  6. Step 6: Final answer
    x = 101,105.10

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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.