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Finding the Fourth Proportional to 81,641.70, 114,065.10 and 81,641.70

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Solution

The fourth proportional to 81,641.70, 114,065.10 and 81,641.70 is: 114,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,641.70 : 114,065.10 = 81,641.70 : x
  2. Step 2: Convert to fraction form
    81,641.70/114,065.10 = 81,641.70/x
  3. Step 3: Cross multiply
    81,641.70x = 114,065.10 × 81,641.70
  4. Step 4: Simplify right side
    81,641.70x = 9,312,468,674.67
  5. Step 5: Solve for x
    x = 9,312,468,674.67/81,641.70
  6. Step 6: Final answer
    x = 114,065.10

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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.