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Finding the Fourth Proportional to 90,775.50, 125,270.19 and 51,031.50

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Solution

The fourth proportional to 90,775.50, 125,270.19 and 51,031.50 is: 70,423.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,775.50 : 125,270.19 = 51,031.50 : x
  2. Step 2: Convert to fraction form
    90,775.50/125,270.19 = 51,031.50/x
  3. Step 3: Cross multiply
    90,775.50x = 125,270.19 × 51,031.50
  4. Step 4: Simplify right side
    90,775.50x = 6,392,725,700.99
  5. Step 5: Solve for x
    x = 6,392,725,700.99/90,775.50
  6. Step 6: Final answer
    x = 70,423.47

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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.