Home / 70,439.22-105,632.10-20,502.72

Finding the Fourth Proportional to 70,439.22, 105,632.10 and 20,502.72

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Solution

The fourth proportional to 70,439.22, 105,632.10 and 20,502.72 is: 30,746.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,439.22 : 105,632.10 = 20,502.72 : x
  2. Step 2: Convert to fraction form
    70,439.22/105,632.10 = 20,502.72/x
  3. Step 3: Cross multiply
    70,439.22x = 105,632.10 × 20,502.72
  4. Step 4: Simplify right side
    70,439.22x = 2,165,745,369.31
  5. Step 5: Solve for x
    x = 2,165,745,369.31/70,439.22
  6. Step 6: Final answer
    x = 30,746.30

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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.