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Finding the Fourth Proportional to 55,722.80, 78,115.60 and 55,722.80

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Solution

The fourth proportional to 55,722.80, 78,115.60 and 55,722.80 is: 78,115.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,722.80 : 78,115.60 = 55,722.80 : x
  2. Step 2: Convert to fraction form
    55,722.80/78,115.60 = 55,722.80/x
  3. Step 3: Cross multiply
    55,722.80x = 78,115.60 × 55,722.80
  4. Step 4: Simplify right side
    55,722.80x = 4,352,819,955.68
  5. Step 5: Solve for x
    x = 4,352,819,955.68/55,722.80
  6. Step 6: Final answer
    x = 78,115.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.