Home / 201,486.45-278,001-129,780.18

Finding the Fourth Proportional to 201,486.45, 278,001 and 129,780.18

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Solution

The fourth proportional to 201,486.45, 278,001 and 129,780.18 is: 179,064.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,486.45 : 278,001 = 129,780.18 : x
  2. Step 2: Convert to fraction form
    201,486.45/278,001 = 129,780.18/x
  3. Step 3: Cross multiply
    201,486.45x = 278,001 × 129,780.18
  4. Step 4: Simplify right side
    201,486.45x = 36,079,019,820.18
  5. Step 5: Solve for x
    x = 36,079,019,820.18/201,486.45
  6. Step 6: Final answer
    x = 179,064.25

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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.