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Finding the Fourth Proportional to 63,422.40, 87,254.64 and 61,672.80

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Solution

The fourth proportional to 63,422.40, 87,254.64 and 61,672.80 is: 84,847.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,422.40 : 87,254.64 = 61,672.80 : x
  2. Step 2: Convert to fraction form
    63,422.40/87,254.64 = 61,672.80/x
  3. Step 3: Cross multiply
    63,422.40x = 87,254.64 × 61,672.80
  4. Step 4: Simplify right side
    63,422.40x = 5,381,237,961.79
  5. Step 5: Solve for x
    x = 5,381,237,961.79/63,422.40
  6. Step 6: Final answer
    x = 84,847.59

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1.5x scale

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.