Home / 289,627.20-434,732.40-139,987.80

Finding the Fourth Proportional to 289,627.20, 434,732.40 and 139,987.80

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Solution

The fourth proportional to 289,627.20, 434,732.40 and 139,987.80 is: 210,122.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,627.20 : 434,732.40 = 139,987.80 : x
  2. Step 2: Convert to fraction form
    289,627.20/434,732.40 = 139,987.80/x
  3. Step 3: Cross multiply
    289,627.20x = 434,732.40 × 139,987.80
  4. Step 4: Simplify right side
    289,627.20x = 60,857,232,264.72
  5. Step 5: Solve for x
    x = 60,857,232,264.72/289,627.20
  6. Step 6: Final answer
    x = 210,122.64

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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.