Home / 144,780.40-217,097.70-85,634.20

Finding the Fourth Proportional to 144,780.40, 217,097.70 and 85,634.20

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Solution

The fourth proportional to 144,780.40, 217,097.70 and 85,634.20 is: 128,408.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,780.40 : 217,097.70 = 85,634.20 : x
  2. Step 2: Convert to fraction form
    144,780.40/217,097.70 = 85,634.20/x
  3. Step 3: Cross multiply
    144,780.40x = 217,097.70 × 85,634.20
  4. Step 4: Simplify right side
    144,780.40x = 18,590,987,861.34
  5. Step 5: Solve for x
    x = 18,590,987,861.34/144,780.40
  6. Step 6: Final answer
    x = 128,408.18

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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.