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Finding the Fourth Proportional to 85,860.10, 128,790.15 and 22,680.10

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Solution

The fourth proportional to 85,860.10, 128,790.15 and 22,680.10 is: 34,020.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,860.10 : 128,790.15 = 22,680.10 : x
  2. Step 2: Convert to fraction form
    85,860.10/128,790.15 = 22,680.10/x
  3. Step 3: Cross multiply
    85,860.10x = 128,790.15 × 22,680.10
  4. Step 4: Simplify right side
    85,860.10x = 2,920,973,481.02
  5. Step 5: Solve for x
    x = 2,920,973,481.02/85,860.10
  6. Step 6: Final answer
    x = 34,020.15

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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.