Home / 76,721.75-105,868.47-42,729.09

Finding the Fourth Proportional to 76,721.75, 105,868.47 and 42,729.09

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Solution

The fourth proportional to 76,721.75, 105,868.47 and 42,729.09 is: 58,961.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,721.75 : 105,868.47 = 42,729.09 : x
  2. Step 2: Convert to fraction form
    76,721.75/105,868.47 = 42,729.09/x
  3. Step 3: Cross multiply
    76,721.75x = 105,868.47 × 42,729.09
  4. Step 4: Simplify right side
    76,721.75x = 4,523,662,905.67
  5. Step 5: Solve for x
    x = 4,523,662,905.67/76,721.75
  6. Step 6: Final answer
    x = 58,961.94

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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.