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Finding the Fourth Proportional to 100,369.55, 138,487.56 and 57,335.30

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Solution

The fourth proportional to 100,369.55, 138,487.56 and 57,335.30 is: 79,109.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,369.55 : 138,487.56 = 57,335.30 : x
  2. Step 2: Convert to fraction form
    100,369.55/138,487.56 = 57,335.30/x
  3. Step 3: Cross multiply
    100,369.55x = 138,487.56 × 57,335.30
  4. Step 4: Simplify right side
    100,369.55x = 7,940,225,798.87
  5. Step 5: Solve for x
    x = 7,940,225,798.87/100,369.55
  6. Step 6: Final answer
    x = 79,109.91

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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.