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Finding the Fourth Proportional to 51,267.40, 76,909.02 and 21,685.40

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Solution

The fourth proportional to 51,267.40, 76,909.02 and 21,685.40 is: 32,531.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,267.40 : 76,909.02 = 21,685.40 : x
  2. Step 2: Convert to fraction form
    51,267.40/76,909.02 = 21,685.40/x
  3. Step 3: Cross multiply
    51,267.40x = 76,909.02 × 21,685.40
  4. Step 4: Simplify right side
    51,267.40x = 1,667,802,862.31
  5. Step 5: Solve for x
    x = 1,667,802,862.31/51,267.40
  6. Step 6: Final answer
    x = 32,531.45

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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.