Home / 100,645.35-138,892.14-55,325.25

Finding the Fourth Proportional to 100,645.35, 138,892.14 and 55,325.25

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Solution

The fourth proportional to 100,645.35, 138,892.14 and 55,325.25 is: 76,349.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,645.35 : 138,892.14 = 55,325.25 : x
  2. Step 2: Convert to fraction form
    100,645.35/138,892.14 = 55,325.25/x
  3. Step 3: Cross multiply
    100,645.35x = 138,892.14 × 55,325.25
  4. Step 4: Simplify right side
    100,645.35x = 7,684,242,368.54
  5. Step 5: Solve for x
    x = 7,684,242,368.54/100,645.35
  6. Step 6: Final answer
    x = 76,349.70

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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.