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Finding the Fourth Proportional to 121,552.32, 167,763.60 and 78,584.64

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Solution

The fourth proportional to 121,552.32, 167,763.60 and 78,584.64 is: 108,460.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,552.32 : 167,763.60 = 78,584.64 : x
  2. Step 2: Convert to fraction form
    121,552.32/167,763.60 = 78,584.64/x
  3. Step 3: Cross multiply
    121,552.32x = 167,763.60 × 78,584.64
  4. Step 4: Simplify right side
    121,552.32x = 13,183,642,111.10
  5. Step 5: Solve for x
    x = 13,183,642,111.10/121,552.32
  6. Step 6: Final answer
    x = 108,460.64

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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.