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Finding the Fourth Proportional to 78,693.66, 118,063.56 and 25,384.57

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Solution

The fourth proportional to 78,693.66, 118,063.56 and 25,384.57 is: 38,084.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,693.66 : 118,063.56 = 25,384.57 : x
  2. Step 2: Convert to fraction form
    78,693.66/118,063.56 = 25,384.57/x
  3. Step 3: Cross multiply
    78,693.66x = 118,063.56 × 25,384.57
  4. Step 4: Simplify right side
    78,693.66x = 2,996,993,024.62
  5. Step 5: Solve for x
    x = 2,996,993,024.62/78,693.66
  6. Step 6: Final answer
    x = 38,084.30

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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.