Home / 70,638.12-105,957.09-18,047.61

Finding the Fourth Proportional to 70,638.12, 105,957.09 and 18,047.61

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Solution

The fourth proportional to 70,638.12, 105,957.09 and 18,047.61 is: 27,071.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,638.12 : 105,957.09 = 18,047.61 : x
  2. Step 2: Convert to fraction form
    70,638.12/105,957.09 = 18,047.61/x
  3. Step 3: Cross multiply
    70,638.12x = 105,957.09 × 18,047.61
  4. Step 4: Simplify right side
    70,638.12x = 1,912,272,237.05
  5. Step 5: Solve for x
    x = 1,912,272,237.05/70,638.12
  6. Step 6: Final answer
    x = 27,071.39

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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.