Home / 209,520.09-314,278.44-138,759.40

Finding the Fourth Proportional to 209,520.09, 314,278.44 and 138,759.40

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Solution

The fourth proportional to 209,520.09, 314,278.44 and 138,759.40 is: 208,137.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,520.09 : 314,278.44 = 138,759.40 : x
  2. Step 2: Convert to fraction form
    209,520.09/314,278.44 = 138,759.40/x
  3. Step 3: Cross multiply
    209,520.09x = 314,278.44 × 138,759.40
  4. Step 4: Simplify right side
    209,520.09x = 43,609,087,767.34
  5. Step 5: Solve for x
    x = 43,609,087,767.34/209,520.09
  6. Step 6: Final answer
    x = 208,137.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.