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Finding the Fourth Proportional to 72,586.48, 108,858.92 and 28,203.70

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Solution

The fourth proportional to 72,586.48, 108,858.92 and 28,203.70 is: 42,297.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,586.48 : 108,858.92 = 28,203.70 : x
  2. Step 2: Convert to fraction form
    72,586.48/108,858.92 = 28,203.70/x
  3. Step 3: Cross multiply
    72,586.48x = 108,858.92 × 28,203.70
  4. Step 4: Simplify right side
    72,586.48x = 3,070,224,322.00
  5. Step 5: Solve for x
    x = 3,070,224,322.00/72,586.48
  6. Step 6: Final answer
    x = 42,297.47

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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.