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Finding the Fourth Proportional to 55,612.80, 83,419.20 and 55,029.60

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Solution

The fourth proportional to 55,612.80, 83,419.20 and 55,029.60 is: 82,544.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,612.80 : 83,419.20 = 55,029.60 : x
  2. Step 2: Convert to fraction form
    55,612.80/83,419.20 = 55,029.60/x
  3. Step 3: Cross multiply
    55,612.80x = 83,419.20 × 55,029.60
  4. Step 4: Simplify right side
    55,612.80x = 4,590,525,208.32
  5. Step 5: Solve for x
    x = 4,590,525,208.32/55,612.80
  6. Step 6: Final answer
    x = 82,544.40

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1.5x scale

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.