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Finding the Fourth Proportional to 53,521.20, 80,128.20 and 51,985.20

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Solution

The fourth proportional to 53,521.20, 80,128.20 and 51,985.20 is: 77,828.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,521.20 : 80,128.20 = 51,985.20 : x
  2. Step 2: Convert to fraction form
    53,521.20/80,128.20 = 51,985.20/x
  3. Step 3: Cross multiply
    53,521.20x = 80,128.20 × 51,985.20
  4. Step 4: Simplify right side
    53,521.20x = 4,165,480,502.64
  5. Step 5: Solve for x
    x = 4,165,480,502.64/53,521.20
  6. Step 6: Final answer
    x = 77,828.61

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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.