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Finding the Fourth Proportional to 100,059.60, 138,039.40 and 57,609.12

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Solution

The fourth proportional to 100,059.60, 138,039.40 and 57,609.12 is: 79,475.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,059.60 : 138,039.40 = 57,609.12 : x
  2. Step 2: Convert to fraction form
    100,059.60/138,039.40 = 57,609.12/x
  3. Step 3: Cross multiply
    100,059.60x = 138,039.40 × 57,609.12
  4. Step 4: Simplify right side
    100,059.60x = 7,952,328,359.33
  5. Step 5: Solve for x
    x = 7,952,328,359.33/100,059.60
  6. Step 6: Final answer
    x = 79,475.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.