Home / 81,454.53-122,143.46-31,557.99

Finding the Fourth Proportional to 81,454.53, 122,143.46 and 31,557.99

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Solution

The fourth proportional to 81,454.53, 122,143.46 and 31,557.99 is: 47,322.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,454.53 : 122,143.46 = 31,557.99 : x
  2. Step 2: Convert to fraction form
    81,454.53/122,143.46 = 31,557.99/x
  3. Step 3: Cross multiply
    81,454.53x = 122,143.46 × 31,557.99
  4. Step 4: Simplify right side
    81,454.53x = 3,854,601,931.46
  5. Step 5: Solve for x
    x = 3,854,601,931.46/81,454.53
  6. Step 6: Final answer
    x = 47,322.13

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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.