Home / 285,312.20-427,976.08-85,632.58

Finding the Fourth Proportional to 285,312.20, 427,976.08 and 85,632.58

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Solution

The fourth proportional to 285,312.20, 427,976.08 and 85,632.58 is: 128,451.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,312.20 : 427,976.08 = 85,632.58 : x
  2. Step 2: Convert to fraction form
    285,312.20/427,976.08 = 85,632.58/x
  3. Step 3: Cross multiply
    285,312.20x = 427,976.08 × 85,632.58
  4. Step 4: Simplify right side
    285,312.20x = 36,648,697,222.72
  5. Step 5: Solve for x
    x = 36,648,697,222.72/285,312.20
  6. Step 6: Final answer
    x = 128,451.21

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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.