Home / 420,916.76-631,373.32-105,372.75

Finding the Fourth Proportional to 420,916.76, 631,373.32 and 105,372.75

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Solution

The fourth proportional to 420,916.76, 631,373.32 and 105,372.75 is: 158,058.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,916.76 : 631,373.32 = 105,372.75 : x
  2. Step 2: Convert to fraction form
    420,916.76/631,373.32 = 105,372.75/x
  3. Step 3: Cross multiply
    420,916.76x = 631,373.32 × 105,372.75
  4. Step 4: Simplify right side
    420,916.76x = 66,529,544,911.67
  5. Step 5: Solve for x
    x = 66,529,544,911.67/420,916.76
  6. Step 6: Final answer
    x = 158,058.67

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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.