Home / 105,321.55-145,343.78-57,574.89

Finding the Fourth Proportional to 105,321.55, 145,343.78 and 57,574.89

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Solution

The fourth proportional to 105,321.55, 145,343.78 and 57,574.89 is: 79,453.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,321.55 : 145,343.78 = 57,574.89 : x
  2. Step 2: Convert to fraction form
    105,321.55/145,343.78 = 57,574.89/x
  3. Step 3: Cross multiply
    105,321.55x = 145,343.78 × 57,574.89
  4. Step 4: Simplify right side
    105,321.55x = 8,368,152,145.68
  5. Step 5: Solve for x
    x = 8,368,152,145.68/105,321.55
  6. Step 6: Final answer
    x = 79,453.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.