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Finding the Fourth Proportional to 85,745.73, 128,618.65 and 35,798.60

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Solution

The fourth proportional to 85,745.73, 128,618.65 and 35,798.60 is: 53,697.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,745.73 : 128,618.65 = 35,798.60 : x
  2. Step 2: Convert to fraction form
    85,745.73/128,618.65 = 35,798.60/x
  3. Step 3: Cross multiply
    85,745.73x = 128,618.65 × 35,798.60
  4. Step 4: Simplify right side
    85,745.73x = 4,604,367,970.18
  5. Step 5: Solve for x
    x = 4,604,367,970.18/85,745.73
  6. Step 6: Final answer
    x = 53,697.92

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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.