Home / 100,208.41-138,253.28-57,156.96

Finding the Fourth Proportional to 100,208.41, 138,253.28 and 57,156.96

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Solution

The fourth proportional to 100,208.41, 138,253.28 and 57,156.96 is: 78,857.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,208.41 : 138,253.28 = 57,156.96 : x
  2. Step 2: Convert to fraction form
    100,208.41/138,253.28 = 57,156.96/x
  3. Step 3: Cross multiply
    100,208.41x = 138,253.28 × 57,156.96
  4. Step 4: Simplify right side
    100,208.41x = 7,902,137,427.49
  5. Step 5: Solve for x
    x = 7,902,137,427.49/100,208.41
  6. Step 6: Final answer
    x = 78,857.03

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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.