Home / 285,975.21-428,965.86-86,297.36

Finding the Fourth Proportional to 285,975.21, 428,965.86 and 86,297.36

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Solution

The fourth proportional to 285,975.21, 428,965.86 and 86,297.36 is: 129,446.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,975.21 : 428,965.86 = 86,297.36 : x
  2. Step 2: Convert to fraction form
    285,975.21/428,965.86 = 86,297.36/x
  3. Step 3: Cross multiply
    285,975.21x = 428,965.86 × 86,297.36
  4. Step 4: Simplify right side
    285,975.21x = 37,018,618,671.81
  5. Step 5: Solve for x
    x = 37,018,618,671.81/285,975.21
  6. Step 6: Final answer
    x = 129,446.95

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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.