Home / 91,438.84-137,388.30-58,173.76

Finding the Fourth Proportional to 91,438.84, 137,388.30 and 58,173.76

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Solution

The fourth proportional to 91,438.84, 137,388.30 and 58,173.76 is: 87,406.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,438.84 : 137,388.30 = 58,173.76 : x
  2. Step 2: Convert to fraction form
    91,438.84/137,388.30 = 58,173.76/x
  3. Step 3: Cross multiply
    91,438.84x = 137,388.30 × 58,173.76
  4. Step 4: Simplify right side
    91,438.84x = 7,992,393,991.01
  5. Step 5: Solve for x
    x = 7,992,393,991.01/91,438.84
  6. Step 6: Final answer
    x = 87,406.99

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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.