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Finding the Fourth Proportional to 78,683.84, 118,037.40 and 26,081.72

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Solution

The fourth proportional to 78,683.84, 118,037.40 and 26,081.72 is: 39,126.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,683.84 : 118,037.40 = 26,081.72 : x
  2. Step 2: Convert to fraction form
    78,683.84/118,037.40 = 26,081.72/x
  3. Step 3: Cross multiply
    78,683.84x = 118,037.40 × 26,081.72
  4. Step 4: Simplify right side
    78,683.84x = 3,078,618,416.33
  5. Step 5: Solve for x
    x = 3,078,618,416.33/78,683.84
  6. Step 6: Final answer
    x = 39,126.44

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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.