Home / 268,278.55-402,471.83-78,738.55

Finding the Fourth Proportional to 268,278.55, 402,471.83 and 78,738.55

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Solution

The fourth proportional to 268,278.55, 402,471.83 and 78,738.55 is: 118,123.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,278.55 : 402,471.83 = 78,738.55 : x
  2. Step 2: Convert to fraction form
    268,278.55/402,471.83 = 78,738.55/x
  3. Step 3: Cross multiply
    268,278.55x = 402,471.83 × 78,738.55
  4. Step 4: Simplify right side
    268,278.55x = 31,690,047,916.35
  5. Step 5: Solve for x
    x = 31,690,047,916.35/268,278.55
  6. Step 6: Final answer
    x = 118,123.67

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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.