Home / 70,741.52-106,129.12-20,823.28

Finding the Fourth Proportional to 70,741.52, 106,129.12 and 20,823.28

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Solution

The fourth proportional to 70,741.52, 106,129.12 and 20,823.28 is: 31,239.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,741.52 : 106,129.12 = 20,823.28 : x
  2. Step 2: Convert to fraction form
    70,741.52/106,129.12 = 20,823.28/x
  3. Step 3: Cross multiply
    70,741.52x = 106,129.12 × 20,823.28
  4. Step 4: Simplify right side
    70,741.52x = 2,209,956,381.91
  5. Step 5: Solve for x
    x = 2,209,956,381.91/70,741.52
  6. Step 6: Final answer
    x = 31,239.88

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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.