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Finding the Fourth Proportional to 78,680.70, 118,021.05 and 70,904.70

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Solution

The fourth proportional to 78,680.70, 118,021.05 and 70,904.70 is: 106,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,680.70 : 118,021.05 = 70,904.70 : x
  2. Step 2: Convert to fraction form
    78,680.70/118,021.05 = 70,904.70/x
  3. Step 3: Cross multiply
    78,680.70x = 118,021.05 × 70,904.70
  4. Step 4: Simplify right side
    78,680.70x = 8,368,247,143.94
  5. Step 5: Solve for x
    x = 8,368,247,143.94/78,680.70
  6. Step 6: Final answer
    x = 106,357.05

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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.