Home / 100,153.26-138,213.14-54,830.49

Finding the Fourth Proportional to 100,153.26, 138,213.14 and 54,830.49

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Solution

The fourth proportional to 100,153.26, 138,213.14 and 54,830.49 is: 75,666.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,153.26 : 138,213.14 = 54,830.49 : x
  2. Step 2: Convert to fraction form
    100,153.26/138,213.14 = 54,830.49/x
  3. Step 3: Cross multiply
    100,153.26x = 138,213.14 × 54,830.49
  4. Step 4: Simplify right side
    100,153.26x = 7,578,293,398.19
  5. Step 5: Solve for x
    x = 7,578,293,398.19/100,153.26
  6. Step 6: Final answer
    x = 75,666.97

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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.