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Finding the Fourth Proportional to 100,661.56, 138,913.23 and 55,344.18

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Solution

The fourth proportional to 100,661.56, 138,913.23 and 55,344.18 is: 76,375.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,661.56 : 138,913.23 = 55,344.18 : x
  2. Step 2: Convert to fraction form
    100,661.56/138,913.23 = 55,344.18/x
  3. Step 3: Cross multiply
    100,661.56x = 138,913.23 × 55,344.18
  4. Step 4: Simplify right side
    100,661.56x = 7,688,038,805.50
  5. Step 5: Solve for x
    x = 7,688,038,805.50/100,661.56
  6. Step 6: Final answer
    x = 76,375.12

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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.