Home / 142,738.10-213,902.35-105,003.70

Finding the Fourth Proportional to 142,738.10, 213,902.35 and 105,003.70

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Solution

The fourth proportional to 142,738.10, 213,902.35 and 105,003.70 is: 157,354.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,738.10 : 213,902.35 = 105,003.70 : x
  2. Step 2: Convert to fraction form
    142,738.10/213,902.35 = 105,003.70/x
  3. Step 3: Cross multiply
    142,738.10x = 213,902.35 × 105,003.70
  4. Step 4: Simplify right side
    142,738.10x = 22,460,538,188.70
  5. Step 5: Solve for x
    x = 22,460,538,188.70/142,738.10
  6. Step 6: Final answer
    x = 157,354.89

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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.