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Finding the Fourth Proportional to 121,751.36, 168,025.80 and 70,084.16

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Solution

The fourth proportional to 121,751.36, 168,025.80 and 70,084.16 is: 96,721.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,751.36 : 168,025.80 = 70,084.16 : x
  2. Step 2: Convert to fraction form
    121,751.36/168,025.80 = 70,084.16/x
  3. Step 3: Cross multiply
    121,751.36x = 168,025.80 × 70,084.16
  4. Step 4: Simplify right side
    121,751.36x = 11,775,947,051.33
  5. Step 5: Solve for x
    x = 11,775,947,051.33/121,751.36
  6. Step 6: Final answer
    x = 96,721.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.