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Finding the Fourth Proportional to 164,064.80, 245,578.80 and 128,813.60

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Solution

The fourth proportional to 164,064.80, 245,578.80 and 128,813.60 is: 192,813.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,064.80 : 245,578.80 = 128,813.60 : x
  2. Step 2: Convert to fraction form
    164,064.80/245,578.80 = 128,813.60/x
  3. Step 3: Cross multiply
    164,064.80x = 245,578.80 × 128,813.60
  4. Step 4: Simplify right side
    164,064.80x = 31,633,889,311.68
  5. Step 5: Solve for x
    x = 31,633,889,311.68/164,064.80
  6. Step 6: Final answer
    x = 192,813.38

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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.