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Finding the Fourth Proportional to 85,565.21, 128,348.03 and 34,964.24

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Solution

The fourth proportional to 85,565.21, 128,348.03 and 34,964.24 is: 52,446.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,565.21 : 128,348.03 = 34,964.24 : x
  2. Step 2: Convert to fraction form
    85,565.21/128,348.03 = 34,964.24/x
  3. Step 3: Cross multiply
    85,565.21x = 128,348.03 × 34,964.24
  4. Step 4: Simplify right side
    85,565.21x = 4,487,590,682.71
  5. Step 5: Solve for x
    x = 4,487,590,682.71/85,565.21
  6. Step 6: Final answer
    x = 52,446.44

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1.5x scale

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.