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Finding the Fourth Proportional to 85,850.20, 128,516.10 and 75,482.20

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Solution

The fourth proportional to 85,850.20, 128,516.10 and 75,482.20 is: 112,995.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,850.20 : 128,516.10 = 75,482.20 : x
  2. Step 2: Convert to fraction form
    85,850.20/128,516.10 = 75,482.20/x
  3. Step 3: Cross multiply
    85,850.20x = 128,516.10 × 75,482.20
  4. Step 4: Simplify right side
    85,850.20x = 9,700,677,963.42
  5. Step 5: Solve for x
    x = 9,700,677,963.42/85,850.20
  6. Step 6: Final answer
    x = 112,995.40

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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.