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Finding the Fourth Proportional to 85,585.64, 128,329.14 and 32,988.20

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Solution

The fourth proportional to 85,585.64, 128,329.14 and 32,988.20 is: 49,463.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,585.64 : 128,329.14 = 32,988.20 : x
  2. Step 2: Convert to fraction form
    85,585.64/128,329.14 = 32,988.20/x
  3. Step 3: Cross multiply
    85,585.64x = 128,329.14 × 32,988.20
  4. Step 4: Simplify right side
    85,585.64x = 4,233,347,336.15
  5. Step 5: Solve for x
    x = 4,233,347,336.15/85,585.64
  6. Step 6: Final answer
    x = 49,463.29

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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.