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Finding the Fourth Proportional to 100,366.30, 138,506.89 and 55,041.30

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Solution

The fourth proportional to 100,366.30, 138,506.89 and 55,041.30 is: 75,957.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,366.30 : 138,506.89 = 55,041.30 : x
  2. Step 2: Convert to fraction form
    100,366.30/138,506.89 = 55,041.30/x
  3. Step 3: Cross multiply
    100,366.30x = 138,506.89 × 55,041.30
  4. Step 4: Simplify right side
    100,366.30x = 7,623,598,316.82
  5. Step 5: Solve for x
    x = 7,623,598,316.82/100,366.30
  6. Step 6: Final answer
    x = 75,957.75

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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.