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Finding the Fourth Proportional to 78,466.90, 117,527.55 and 69,711.70

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Solution

The fourth proportional to 78,466.90, 117,527.55 and 69,711.70 is: 104,414.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,466.90 : 117,527.55 = 69,711.70 : x
  2. Step 2: Convert to fraction form
    78,466.90/117,527.55 = 69,711.70/x
  3. Step 3: Cross multiply
    78,466.90x = 117,527.55 × 69,711.70
  4. Step 4: Simplify right side
    78,466.90x = 8,193,045,307.34
  5. Step 5: Solve for x
    x = 8,193,045,307.34/78,466.90
  6. Step 6: Final answer
    x = 104,414.03

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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.