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Finding the Fourth Proportional to 79,660.40, 119,555.40 and 77,068.40

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Solution

The fourth proportional to 79,660.40, 119,555.40 and 77,068.40 is: 115,665.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,660.40 : 119,555.40 = 77,068.40 : x
  2. Step 2: Convert to fraction form
    79,660.40/119,555.40 = 77,068.40/x
  3. Step 3: Cross multiply
    79,660.40x = 119,555.40 × 77,068.40
  4. Step 4: Simplify right side
    79,660.40x = 9,213,943,389.36
  5. Step 5: Solve for x
    x = 9,213,943,389.36/79,660.40
  6. Step 6: Final answer
    x = 115,665.29

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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.