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Finding the Fourth Proportional to 84,490.86, 126,764.37 and 28,336.50

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Solution

The fourth proportional to 84,490.86, 126,764.37 and 28,336.50 is: 42,514.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,490.86 : 126,764.37 = 28,336.50 : x
  2. Step 2: Convert to fraction form
    84,490.86/126,764.37 = 28,336.50/x
  3. Step 3: Cross multiply
    84,490.86x = 126,764.37 × 28,336.50
  4. Step 4: Simplify right side
    84,490.86x = 3,592,058,570.51
  5. Step 5: Solve for x
    x = 3,592,058,570.51/84,490.86
  6. Step 6: Final answer
    x = 42,514.17

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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.