Home / 84,128.24-126,174.54-31,541.60

Finding the Fourth Proportional to 84,128.24, 126,174.54 and 31,541.60

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Solution

The fourth proportional to 84,128.24, 126,174.54 and 31,541.60 is: 47,305.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,128.24 : 126,174.54 = 31,541.60 : x
  2. Step 2: Convert to fraction form
    84,128.24/126,174.54 = 31,541.60/x
  3. Step 3: Cross multiply
    84,128.24x = 126,174.54 × 31,541.60
  4. Step 4: Simplify right side
    84,128.24x = 3,979,746,870.86
  5. Step 5: Solve for x
    x = 3,979,746,870.86/84,128.24
  6. Step 6: Final answer
    x = 47,305.72

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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.