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Finding the Fourth Proportional to 56,470.80, 84,821.40 and 54,512.40

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Solution

The fourth proportional to 56,470.80, 84,821.40 and 54,512.40 is: 81,879.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,470.80 : 84,821.40 = 54,512.40 : x
  2. Step 2: Convert to fraction form
    56,470.80/84,821.40 = 54,512.40/x
  3. Step 3: Cross multiply
    56,470.80x = 84,821.40 × 54,512.40
  4. Step 4: Simplify right side
    56,470.80x = 4,623,818,085.36
  5. Step 5: Solve for x
    x = 4,623,818,085.36/56,470.80
  6. Step 6: Final answer
    x = 81,879.80

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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.