Home / 285,929.80-428,756.16-86,212.96

Finding the Fourth Proportional to 285,929.80, 428,756.16 and 86,212.96

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Solution

The fourth proportional to 285,929.80, 428,756.16 and 86,212.96 is: 129,277.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,929.80 : 428,756.16 = 86,212.96 : x
  2. Step 2: Convert to fraction form
    285,929.80/428,756.16 = 86,212.96/x
  3. Step 3: Cross multiply
    285,929.80x = 428,756.16 × 86,212.96
  4. Step 4: Simplify right side
    285,929.80x = 36,964,337,671.83
  5. Step 5: Solve for x
    x = 36,964,337,671.83/285,929.80
  6. Step 6: Final answer
    x = 129,277.67

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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.