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Finding the Fourth Proportional to 164,028.80, 245,889.60 and 128,470.40

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Solution

The fourth proportional to 164,028.80, 245,889.60 and 128,470.40 is: 192,585.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,028.80 : 245,889.60 = 128,470.40 : x
  2. Step 2: Convert to fraction form
    164,028.80/245,889.60 = 128,470.40/x
  3. Step 3: Cross multiply
    164,028.80x = 245,889.60 × 128,470.40
  4. Step 4: Simplify right side
    164,028.80x = 31,589,535,267.84
  5. Step 5: Solve for x
    x = 31,589,535,267.84/164,028.80
  6. Step 6: Final answer
    x = 192,585.30

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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.