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Finding the Fourth Proportional to 90,371.09, 124,712.10 and 50,090.90

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Solution

The fourth proportional to 90,371.09, 124,712.10 and 50,090.90 is: 69,125.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,371.09 : 124,712.10 = 50,090.90 : x
  2. Step 2: Convert to fraction form
    90,371.09/124,712.10 = 50,090.90/x
  3. Step 3: Cross multiply
    90,371.09x = 124,712.10 × 50,090.90
  4. Step 4: Simplify right side
    90,371.09x = 6,246,941,641.67
  5. Step 5: Solve for x
    x = 6,246,941,641.67/90,371.09
  6. Step 6: Final answer
    x = 69,125.44

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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.