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Finding the Fourth Proportional to 85,509.69, 128,292.19 and 41,130.64

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Solution

The fourth proportional to 85,509.69, 128,292.19 and 41,130.64 is: 61,709.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,509.69 : 128,292.19 = 41,130.64 : x
  2. Step 2: Convert to fraction form
    85,509.69/128,292.19 = 41,130.64/x
  3. Step 3: Cross multiply
    85,509.69x = 128,292.19 × 41,130.64
  4. Step 4: Simplify right side
    85,509.69x = 5,276,740,170.60
  5. Step 5: Solve for x
    x = 5,276,740,170.60/85,509.69
  6. Step 6: Final answer
    x = 61,709.27

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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.