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Finding the Fourth Proportional to 55,914.80, 78,384.40 and 55,914.80

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Solution

The fourth proportional to 55,914.80, 78,384.40 and 55,914.80 is: 78,384.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,914.80 : 78,384.40 = 55,914.80 : x
  2. Step 2: Convert to fraction form
    55,914.80/78,384.40 = 55,914.80/x
  3. Step 3: Cross multiply
    55,914.80x = 78,384.40 × 55,914.80
  4. Step 4: Simplify right side
    55,914.80x = 4,382,848,049.12
  5. Step 5: Solve for x
    x = 4,382,848,049.12/55,914.80
  6. Step 6: Final answer
    x = 78,384.40

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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.