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Finding the Fourth Proportional to 78,706.40, 118,059.60 and 26,117.60

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Solution

The fourth proportional to 78,706.40, 118,059.60 and 26,117.60 is: 39,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,706.40 : 118,059.60 = 26,117.60 : x
  2. Step 2: Convert to fraction form
    78,706.40/118,059.60 = 26,117.60/x
  3. Step 3: Cross multiply
    78,706.40x = 118,059.60 × 26,117.60
  4. Step 4: Simplify right side
    78,706.40x = 3,083,433,408.96
  5. Step 5: Solve for x
    x = 3,083,433,408.96/78,706.40
  6. Step 6: Final answer
    x = 39,176.40

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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.