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Finding the Fourth Proportional to 101,649.24, 139,962.82 and 90,299.06

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Solution

The fourth proportional to 101,649.24, 139,962.82 and 90,299.06 is: 124,334.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,649.24 : 139,962.82 = 90,299.06 : x
  2. Step 2: Convert to fraction form
    101,649.24/139,962.82 = 90,299.06/x
  3. Step 3: Cross multiply
    101,649.24x = 139,962.82 × 90,299.06
  4. Step 4: Simplify right side
    101,649.24x = 12,638,511,080.95
  5. Step 5: Solve for x
    x = 12,638,511,080.95/101,649.24
  6. Step 6: Final answer
    x = 124,334.54

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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.