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Finding the Fourth Proportional to 110,307.40, 165,072.30 and 76,870.60

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Solution

The fourth proportional to 110,307.40, 165,072.30 and 76,870.60 is: 115,034.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,307.40 : 165,072.30 = 76,870.60 : x
  2. Step 2: Convert to fraction form
    110,307.40/165,072.30 = 76,870.60/x
  3. Step 3: Cross multiply
    110,307.40x = 165,072.30 × 76,870.60
  4. Step 4: Simplify right side
    110,307.40x = 12,689,206,744.38
  5. Step 5: Solve for x
    x = 12,689,206,744.38/110,307.40
  6. Step 6: Final answer
    x = 115,034.95

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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.