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Finding the Fourth Proportional to 85,029.72, 127,486.92 and 47,615.52

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Solution

The fourth proportional to 85,029.72, 127,486.92 and 47,615.52 is: 71,390.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,029.72 : 127,486.92 = 47,615.52 : x
  2. Step 2: Convert to fraction form
    85,029.72/127,486.92 = 47,615.52/x
  3. Step 3: Cross multiply
    85,029.72x = 127,486.92 × 47,615.52
  4. Step 4: Simplify right side
    85,029.72x = 6,070,355,989.00
  5. Step 5: Solve for x
    x = 6,070,355,989.00/85,029.72
  6. Step 6: Final answer
    x = 71,390.99

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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.