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Finding the Fourth Proportional to 85,882.72, 128,861.16 and 46,467.60

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Solution

The fourth proportional to 85,882.72, 128,861.16 and 46,467.60 is: 69,721.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,882.72 : 128,861.16 = 46,467.60 : x
  2. Step 2: Convert to fraction form
    85,882.72/128,861.16 = 46,467.60/x
  3. Step 3: Cross multiply
    85,882.72x = 128,861.16 × 46,467.60
  4. Step 4: Simplify right side
    85,882.72x = 5,987,868,838.42
  5. Step 5: Solve for x
    x = 5,987,868,838.42/85,882.72
  6. Step 6: Final answer
    x = 69,721.46

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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.