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Finding the Fourth Proportional to 80,473.40, 120,710.10 and 47,209.40

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Solution

The fourth proportional to 80,473.40, 120,710.10 and 47,209.40 is: 70,814.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,473.40 : 120,710.10 = 47,209.40 : x
  2. Step 2: Convert to fraction form
    80,473.40/120,710.10 = 47,209.40/x
  3. Step 3: Cross multiply
    80,473.40x = 120,710.10 × 47,209.40
  4. Step 4: Simplify right side
    80,473.40x = 5,698,651,394.94
  5. Step 5: Solve for x
    x = 5,698,651,394.94/80,473.40
  6. Step 6: Final answer
    x = 70,814.10

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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.