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Finding the Fourth Proportional to 105,369.33, 145,406.72 and 57,621.65

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Solution

The fourth proportional to 105,369.33, 145,406.72 and 57,621.65 is: 79,516.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,369.33 : 145,406.72 = 57,621.65 : x
  2. Step 2: Convert to fraction form
    105,369.33/145,406.72 = 57,621.65/x
  3. Step 3: Cross multiply
    105,369.33x = 145,406.72 × 57,621.65
  4. Step 4: Simplify right side
    105,369.33x = 8,378,575,635.06
  5. Step 5: Solve for x
    x = 8,378,575,635.06/105,369.33
  6. Step 6: Final answer
    x = 79,516.27

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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.