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Finding the Fourth Proportional to 56,860.21, 78,370.72 and 39,869.65

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Solution

The fourth proportional to 56,860.21, 78,370.72 and 39,869.65 is: 54,952.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,860.21 : 78,370.72 = 39,869.65 : x
  2. Step 2: Convert to fraction form
    56,860.21/78,370.72 = 39,869.65/x
  3. Step 3: Cross multiply
    56,860.21x = 78,370.72 × 39,869.65
  4. Step 4: Simplify right side
    56,860.21x = 3,124,613,176.65
  5. Step 5: Solve for x
    x = 3,124,613,176.65/56,860.21
  6. Step 6: Final answer
    x = 54,952.54

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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.