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Finding the Fourth Proportional to 100,627.17, 138,719.17 and 70,318.42

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Solution

The fourth proportional to 100,627.17, 138,719.17 and 70,318.42 is: 96,937.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,627.17 : 138,719.17 = 70,318.42 : x
  2. Step 2: Convert to fraction form
    100,627.17/138,719.17 = 70,318.42/x
  3. Step 3: Cross multiply
    100,627.17x = 138,719.17 × 70,318.42
  4. Step 4: Simplify right side
    100,627.17x = 9,754,512,858.11
  5. Step 5: Solve for x
    x = 9,754,512,858.11/100,627.17
  6. Step 6: Final answer
    x = 96,937.17

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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.