Home / 289,683.60-434,555.40-79,321.50

Finding the Fourth Proportional to 289,683.60, 434,555.40 and 79,321.50

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Solution

The fourth proportional to 289,683.60, 434,555.40 and 79,321.50 is: 118,990.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,683.60 : 434,555.40 = 79,321.50 : x
  2. Step 2: Convert to fraction form
    289,683.60/434,555.40 = 79,321.50/x
  3. Step 3: Cross multiply
    289,683.60x = 434,555.40 × 79,321.50
  4. Step 4: Simplify right side
    289,683.60x = 34,469,586,161.10
  5. Step 5: Solve for x
    x = 34,469,586,161.10/289,683.60
  6. Step 6: Final answer
    x = 118,990.46

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1.5x scale

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.