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Finding the Fourth Proportional to 215,216.80, 322,825.20 and 136,679.20

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Solution

The fourth proportional to 215,216.80, 322,825.20 and 136,679.20 is: 205,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,216.80 : 322,825.20 = 136,679.20 : x
  2. Step 2: Convert to fraction form
    215,216.80/322,825.20 = 136,679.20/x
  3. Step 3: Cross multiply
    215,216.80x = 322,825.20 × 136,679.20
  4. Step 4: Simplify right side
    215,216.80x = 44,123,490,075.84
  5. Step 5: Solve for x
    x = 44,123,490,075.84/215,216.80
  6. Step 6: Final answer
    x = 205,018.80

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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.