Home / 289,355.36-434,313.60-139,701.20

Finding the Fourth Proportional to 289,355.36, 434,313.60 and 139,701.20

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Solution

The fourth proportional to 289,355.36, 434,313.60 and 139,701.20 is: 209,687.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,355.36 : 434,313.60 = 139,701.20 : x
  2. Step 2: Convert to fraction form
    289,355.36/434,313.60 = 139,701.20/x
  3. Step 3: Cross multiply
    289,355.36x = 434,313.60 × 139,701.20
  4. Step 4: Simplify right side
    289,355.36x = 60,674,131,096.32
  5. Step 5: Solve for x
    x = 60,674,131,096.32/289,355.36
  6. Step 6: Final answer
    x = 209,687.25

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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.