Home / 70,306.30-105,437.72-20,390.06

Finding the Fourth Proportional to 70,306.30, 105,437.72 and 20,390.06

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Solution

The fourth proportional to 70,306.30, 105,437.72 and 20,390.06 is: 30,578.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,306.30 : 105,437.72 = 20,390.06 : x
  2. Step 2: Convert to fraction form
    70,306.30/105,437.72 = 20,390.06/x
  3. Step 3: Cross multiply
    70,306.30x = 105,437.72 × 20,390.06
  4. Step 4: Simplify right side
    70,306.30x = 2,149,881,636.94
  5. Step 5: Solve for x
    x = 2,149,881,636.94/70,306.30
  6. Step 6: Final answer
    x = 30,578.79

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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.