Home / 90,409.14-135,437.16-42,956.70

Finding the Fourth Proportional to 90,409.14, 135,437.16 and 42,956.70

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Solution

The fourth proportional to 90,409.14, 135,437.16 and 42,956.70 is: 64,351.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,409.14 : 135,437.16 = 42,956.70 : x
  2. Step 2: Convert to fraction form
    90,409.14/135,437.16 = 42,956.70/x
  3. Step 3: Cross multiply
    90,409.14x = 135,437.16 × 42,956.70
  4. Step 4: Simplify right side
    90,409.14x = 5,817,933,450.97
  5. Step 5: Solve for x
    x = 5,817,933,450.97/90,409.14
  6. Step 6: Final answer
    x = 64,351.16

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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.