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Finding the Fourth Proportional to 84,851.84, 126,657.46 and 78,684.32

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Solution

The fourth proportional to 84,851.84, 126,657.46 and 78,684.32 is: 117,451.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,851.84 : 126,657.46 = 78,684.32 : x
  2. Step 2: Convert to fraction form
    84,851.84/126,657.46 = 78,684.32/x
  3. Step 3: Cross multiply
    84,851.84x = 126,657.46 × 78,684.32
  4. Step 4: Simplify right side
    84,851.84x = 9,965,956,113.03
  5. Step 5: Solve for x
    x = 9,965,956,113.03/84,851.84
  6. Step 6: Final answer
    x = 117,451.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.