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Finding the Fourth Proportional to 84,458.40, 126,737.52 and 31,187.69

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Solution

The fourth proportional to 84,458.40, 126,737.52 and 31,187.69 is: 46,799.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,458.40 : 126,737.52 = 31,187.69 : x
  2. Step 2: Convert to fraction form
    84,458.40/126,737.52 = 31,187.69/x
  3. Step 3: Cross multiply
    84,458.40x = 126,737.52 × 31,187.69
  4. Step 4: Simplify right side
    84,458.40x = 3,952,650,485.13
  5. Step 5: Solve for x
    x = 3,952,650,485.13/84,458.40
  6. Step 6: Final answer
    x = 46,799.97

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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.