Home / 285,981.21-428,974.88-86,303.39

Finding the Fourth Proportional to 285,981.21, 428,974.88 and 86,303.39

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Solution

The fourth proportional to 285,981.21, 428,974.88 and 86,303.39 is: 129,456.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,981.21 : 428,974.88 = 86,303.39 : x
  2. Step 2: Convert to fraction form
    285,981.21/428,974.88 = 86,303.39/x
  3. Step 3: Cross multiply
    285,981.21x = 428,974.88 × 86,303.39
  4. Step 4: Simplify right side
    285,981.21x = 37,021,983,792.45
  5. Step 5: Solve for x
    x = 37,021,983,792.45/285,981.21
  6. Step 6: Final answer
    x = 129,456.00

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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.