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Finding the Fourth Proportional to 78,813.55, 118,220.33 and 78,813.55

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Solution

The fourth proportional to 78,813.55, 118,220.33 and 78,813.55 is: 118,220.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,813.55 : 118,220.33 = 78,813.55 : x
  2. Step 2: Convert to fraction form
    78,813.55/118,220.33 = 78,813.55/x
  3. Step 3: Cross multiply
    78,813.55x = 118,220.33 × 78,813.55
  4. Step 4: Simplify right side
    78,813.55x = 9,317,363,889.47
  5. Step 5: Solve for x
    x = 9,317,363,889.47/78,813.55
  6. Step 6: Final answer
    x = 118,220.33

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Similar ratio
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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.