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Finding the Fourth Proportional to 67,256.95, 100,885.16 and 20,509.69

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Solution

The fourth proportional to 67,256.95, 100,885.16 and 20,509.69 is: 30,764.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,256.95 : 100,885.16 = 20,509.69 : x
  2. Step 2: Convert to fraction form
    67,256.95/100,885.16 = 20,509.69/x
  3. Step 3: Cross multiply
    67,256.95x = 100,885.16 × 20,509.69
  4. Step 4: Simplify right side
    67,256.95x = 2,069,123,254.65
  5. Step 5: Solve for x
    x = 2,069,123,254.65/67,256.95
  6. Step 6: Final answer
    x = 30,764.45

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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.