Home / 100,360.12-138,503.36-66,308.84

Finding the Fourth Proportional to 100,360.12, 138,503.36 and 66,308.84

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Solution

The fourth proportional to 100,360.12, 138,503.36 and 66,308.84 is: 91,510.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,360.12 : 138,503.36 = 66,308.84 : x
  2. Step 2: Convert to fraction form
    100,360.12/138,503.36 = 66,308.84/x
  3. Step 3: Cross multiply
    100,360.12x = 138,503.36 × 66,308.84
  4. Step 4: Simplify right side
    100,360.12x = 9,183,997,137.70
  5. Step 5: Solve for x
    x = 9,183,997,137.70/100,360.12
  6. Step 6: Final answer
    x = 91,510.42

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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.