Home / 82,120.47-123,148.13-28,071.69

Finding the Fourth Proportional to 82,120.47, 123,148.13 and 28,071.69

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Solution

The fourth proportional to 82,120.47, 123,148.13 and 28,071.69 is: 42,096.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,120.47 : 123,148.13 = 28,071.69 : x
  2. Step 2: Convert to fraction form
    82,120.47/123,148.13 = 28,071.69/x
  3. Step 3: Cross multiply
    82,120.47x = 123,148.13 × 28,071.69
  4. Step 4: Simplify right side
    82,120.47x = 3,456,975,989.08
  5. Step 5: Solve for x
    x = 3,456,975,989.08/82,120.47
  6. Step 6: Final answer
    x = 42,096.40

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1.5x scale

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.