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Finding the Fourth Proportional to 63,111.60, 87,031.80 and 48,959.28

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Solution

The fourth proportional to 63,111.60, 87,031.80 and 48,959.28 is: 67,515.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,111.60 : 87,031.80 = 48,959.28 : x
  2. Step 2: Convert to fraction form
    63,111.60/87,031.80 = 48,959.28/x
  3. Step 3: Cross multiply
    63,111.60x = 87,031.80 × 48,959.28
  4. Step 4: Simplify right side
    63,111.60x = 4,261,014,265.10
  5. Step 5: Solve for x
    x = 4,261,014,265.10/63,111.60
  6. Step 6: Final answer
    x = 67,515.55

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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.