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Finding the Fourth Proportional to 99,660.94, 137,529.54 and 54,339.01

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Solution

The fourth proportional to 99,660.94, 137,529.54 and 54,339.01 is: 74,986.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,660.94 : 137,529.54 = 54,339.01 : x
  2. Step 2: Convert to fraction form
    99,660.94/137,529.54 = 54,339.01/x
  3. Step 3: Cross multiply
    99,660.94x = 137,529.54 × 54,339.01
  4. Step 4: Simplify right side
    99,660.94x = 7,473,219,049.36
  5. Step 5: Solve for x
    x = 7,473,219,049.36/99,660.94
  6. Step 6: Final answer
    x = 74,986.44

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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.