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Finding the Fourth Proportional to 85,545.34, 128,339.88 and 35,608.84

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Solution

The fourth proportional to 85,545.34, 128,339.88 and 35,608.84 is: 53,422.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,545.34 : 128,339.88 = 35,608.84 : x
  2. Step 2: Convert to fraction form
    85,545.34/128,339.88 = 35,608.84/x
  3. Step 3: Cross multiply
    85,545.34x = 128,339.88 × 35,608.84
  4. Step 4: Simplify right side
    85,545.34x = 4,570,034,252.54
  5. Step 5: Solve for x
    x = 4,570,034,252.54/85,545.34
  6. Step 6: Final answer
    x = 53,422.36

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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.