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Finding the Fourth Proportional to 63,420.91, 87,579.69 and 47,477.68

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Solution

The fourth proportional to 63,420.91, 87,579.69 and 47,477.68 is: 65,563.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,420.91 : 87,579.69 = 47,477.68 : x
  2. Step 2: Convert to fraction form
    63,420.91/87,579.69 = 47,477.68/x
  3. Step 3: Cross multiply
    63,420.91x = 87,579.69 × 47,477.68
  4. Step 4: Simplify right side
    63,420.91x = 4,158,080,258.93
  5. Step 5: Solve for x
    x = 4,158,080,258.93/63,420.91
  6. Step 6: Final answer
    x = 65,563.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.