Home / 100,250.26-138,269.43-64,420.82

Finding the Fourth Proportional to 100,250.26, 138,269.43 and 64,420.82

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Solution

The fourth proportional to 100,250.26, 138,269.43 and 64,420.82 is: 88,851.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,250.26 : 138,269.43 = 64,420.82 : x
  2. Step 2: Convert to fraction form
    100,250.26/138,269.43 = 64,420.82/x
  3. Step 3: Cross multiply
    100,250.26x = 138,269.43 × 64,420.82
  4. Step 4: Simplify right side
    100,250.26x = 8,907,429,888.70
  5. Step 5: Solve for x
    x = 8,907,429,888.70/100,250.26
  6. Step 6: Final answer
    x = 88,851.94

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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.