Home / 145,015.78-217,514.94-86,225.58

Finding the Fourth Proportional to 145,015.78, 217,514.94 and 86,225.58

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Solution

The fourth proportional to 145,015.78, 217,514.94 and 86,225.58 is: 129,333.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,015.78 : 217,514.94 = 86,225.58 : x
  2. Step 2: Convert to fraction form
    145,015.78/217,514.94 = 86,225.58/x
  3. Step 3: Cross multiply
    145,015.78x = 217,514.94 × 86,225.58
  4. Step 4: Simplify right side
    145,015.78x = 18,755,351,860.17
  5. Step 5: Solve for x
    x = 18,755,351,860.17/145,015.78
  6. Step 6: Final answer
    x = 129,333.18

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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.