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Finding the Fourth Proportional to 77,920.40, 116,880.60 and 46,816.40

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Solution

The fourth proportional to 77,920.40, 116,880.60 and 46,816.40 is: 70,224.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,920.40 : 116,880.60 = 46,816.40 : x
  2. Step 2: Convert to fraction form
    77,920.40/116,880.60 = 46,816.40/x
  3. Step 3: Cross multiply
    77,920.40x = 116,880.60 × 46,816.40
  4. Step 4: Simplify right side
    77,920.40x = 5,471,928,921.84
  5. Step 5: Solve for x
    x = 5,471,928,921.84/77,920.40
  6. Step 6: Final answer
    x = 70,224.60

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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.