Home / 100,271.76-138,378.84-57,258.26

Finding the Fourth Proportional to 100,271.76, 138,378.84 and 57,258.26

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Solution

The fourth proportional to 100,271.76, 138,378.84 and 57,258.26 is: 79,018.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,271.76 : 138,378.84 = 57,258.26 : x
  2. Step 2: Convert to fraction form
    100,271.76/138,378.84 = 57,258.26/x
  3. Step 3: Cross multiply
    100,271.76x = 138,378.84 × 57,258.26
  4. Step 4: Simplify right side
    100,271.76x = 7,923,330,907.32
  5. Step 5: Solve for x
    x = 7,923,330,907.32/100,271.76
  6. Step 6: Final answer
    x = 79,018.57

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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.