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Finding the Fourth Proportional to 51,909.80, 77,816.10 and 40,658.90

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Solution

The fourth proportional to 51,909.80, 77,816.10 and 40,658.90 is: 60,950.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,909.80 : 77,816.10 = 40,658.90 : x
  2. Step 2: Convert to fraction form
    51,909.80/77,816.10 = 40,658.90/x
  3. Step 3: Cross multiply
    51,909.80x = 77,816.10 × 40,658.90
  4. Step 4: Simplify right side
    51,909.80x = 3,163,917,028.29
  5. Step 5: Solve for x
    x = 3,163,917,028.29/51,909.80
  6. Step 6: Final answer
    x = 60,950.28

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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.