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Finding the Fourth Proportional to 99,682.80, 137,561.40 and 54,361.50

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Solution

The fourth proportional to 99,682.80, 137,561.40 and 54,361.50 is: 75,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,682.80 : 137,561.40 = 54,361.50 : x
  2. Step 2: Convert to fraction form
    99,682.80/137,561.40 = 54,361.50/x
  3. Step 3: Cross multiply
    99,682.80x = 137,561.40 × 54,361.50
  4. Step 4: Simplify right side
    99,682.80x = 7,478,044,046.10
  5. Step 5: Solve for x
    x = 7,478,044,046.10/99,682.80
  6. Step 6: Final answer
    x = 75,018.40

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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.