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Finding the Fourth Proportional to 99,642.99, 137,504.12 and 54,320.25

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Solution

The fourth proportional to 99,642.99, 137,504.12 and 54,320.25 is: 74,960.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,642.99 : 137,504.12 = 54,320.25 : x
  2. Step 2: Convert to fraction form
    99,642.99/137,504.12 = 54,320.25/x
  3. Step 3: Cross multiply
    99,642.99x = 137,504.12 × 54,320.25
  4. Step 4: Simplify right side
    99,642.99x = 7,469,258,418.47
  5. Step 5: Solve for x
    x = 7,469,258,418.47/99,642.99
  6. Step 6: Final answer
    x = 74,960.20

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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.