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Finding the Fourth Proportional to 56,077.20, 84,148.20 and 21,020.40

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Solution

The fourth proportional to 56,077.20, 84,148.20 and 21,020.40 is: 31,542.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,077.20 : 84,148.20 = 21,020.40 : x
  2. Step 2: Convert to fraction form
    56,077.20/84,148.20 = 21,020.40/x
  3. Step 3: Cross multiply
    56,077.20x = 84,148.20 × 21,020.40
  4. Step 4: Simplify right side
    56,077.20x = 1,768,828,823.28
  5. Step 5: Solve for x
    x = 1,768,828,823.28/56,077.20
  6. Step 6: Final answer
    x = 31,542.75

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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.