Home / 57,140.30-78,852.75-31,990.70

Finding the Fourth Proportional to 57,140.30, 78,852.75 and 31,990.70

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Solution

The fourth proportional to 57,140.30, 78,852.75 and 31,990.70 is: 44,146.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,140.30 : 78,852.75 = 31,990.70 : x
  2. Step 2: Convert to fraction form
    57,140.30/78,852.75 = 31,990.70/x
  3. Step 3: Cross multiply
    57,140.30x = 78,852.75 × 31,990.70
  4. Step 4: Simplify right side
    57,140.30x = 2,522,554,669.43
  5. Step 5: Solve for x
    x = 2,522,554,669.43/57,140.30
  6. Step 6: Final answer
    x = 44,146.68

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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.