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Finding the Fourth Proportional to 51,108.75, 70,531.16 and 28,752.75

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Solution

The fourth proportional to 51,108.75, 70,531.16 and 28,752.75 is: 39,679.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,108.75 : 70,531.16 = 28,752.75 : x
  2. Step 2: Convert to fraction form
    51,108.75/70,531.16 = 28,752.75/x
  3. Step 3: Cross multiply
    51,108.75x = 70,531.16 × 28,752.75
  4. Step 4: Simplify right side
    51,108.75x = 2,027,964,810.69
  5. Step 5: Solve for x
    x = 2,027,964,810.69/51,108.75
  6. Step 6: Final answer
    x = 39,679.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.