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Finding the Fourth Proportional to 64,672.64, 89,271.84 and 40,814.88

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Solution

The fourth proportional to 64,672.64, 89,271.84 and 40,814.88 is: 56,339.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,672.64 : 89,271.84 = 40,814.88 : x
  2. Step 2: Convert to fraction form
    64,672.64/89,271.84 = 40,814.88/x
  3. Step 3: Cross multiply
    64,672.64x = 89,271.84 × 40,814.88
  4. Step 4: Simplify right side
    64,672.64x = 3,643,619,436.98
  5. Step 5: Solve for x
    x = 3,643,619,436.98/64,672.64
  6. Step 6: Final answer
    x = 56,339.43

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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.