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Finding the Fourth Proportional to 81,378.70, 114,085.70 and 81,378.70

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Solution

The fourth proportional to 81,378.70, 114,085.70 and 81,378.70 is: 114,085.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,378.70 : 114,085.70 = 81,378.70 : x
  2. Step 2: Convert to fraction form
    81,378.70/114,085.70 = 81,378.70/x
  3. Step 3: Cross multiply
    81,378.70x = 114,085.70 × 81,378.70
  4. Step 4: Simplify right side
    81,378.70x = 9,284,145,954.59
  5. Step 5: Solve for x
    x = 9,284,145,954.59/81,378.70
  6. Step 6: Final answer
    x = 114,085.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.