Home / 76,721.68-105,871.88-42,729.56

Finding the Fourth Proportional to 76,721.68, 105,871.88 and 42,729.56

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Solution

The fourth proportional to 76,721.68, 105,871.88 and 42,729.56 is: 58,964.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,721.68 : 105,871.88 = 42,729.56 : x
  2. Step 2: Convert to fraction form
    76,721.68/105,871.88 = 42,729.56/x
  3. Step 3: Cross multiply
    76,721.68x = 105,871.88 × 42,729.56
  4. Step 4: Simplify right side
    76,721.68x = 4,523,858,848.77
  5. Step 5: Solve for x
    x = 4,523,858,848.77/76,721.68
  6. Step 6: Final answer
    x = 58,964.54

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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.