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Finding the Fourth Proportional to 85,745.92, 128,618.93 and 35,798.79

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Solution

The fourth proportional to 85,745.92, 128,618.93 and 35,798.79 is: 53,698.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,745.92 : 128,618.93 = 35,798.79 : x
  2. Step 2: Convert to fraction form
    85,745.92/128,618.93 = 35,798.79/x
  3. Step 3: Cross multiply
    85,745.92x = 128,618.93 × 35,798.79
  4. Step 4: Simplify right side
    85,745.92x = 4,604,402,154.59
  5. Step 5: Solve for x
    x = 4,604,402,154.59/85,745.92
  6. Step 6: Final answer
    x = 53,698.21

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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.