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Finding the Fourth Proportional to 39,980.52, 55,406.48 and 39,416.76

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Solution

The fourth proportional to 39,980.52, 55,406.48 and 39,416.76 is: 54,625.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,980.52 : 55,406.48 = 39,416.76 : x
  2. Step 2: Convert to fraction form
    39,980.52/55,406.48 = 39,416.76/x
  3. Step 3: Cross multiply
    39,980.52x = 55,406.48 × 39,416.76
  4. Step 4: Simplify right side
    39,980.52x = 2,183,943,924.60
  5. Step 5: Solve for x
    x = 2,183,943,924.60/39,980.52
  6. Step 6: Final answer
    x = 54,625.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.