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Finding the Fourth Proportional to 85,625.80, 128,438.88 and 46,201.48

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Solution

The fourth proportional to 85,625.80, 128,438.88 and 46,201.48 is: 69,302.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,625.80 : 128,438.88 = 46,201.48 : x
  2. Step 2: Convert to fraction form
    85,625.80/128,438.88 = 46,201.48/x
  3. Step 3: Cross multiply
    85,625.80x = 128,438.88 × 46,201.48
  4. Step 4: Simplify right side
    85,625.80x = 5,934,066,345.54
  5. Step 5: Solve for x
    x = 5,934,066,345.54/85,625.80
  6. Step 6: Final answer
    x = 69,302.32

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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.