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Finding the Fourth Proportional to 76,813.36, 115,635 and 69,088.98

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Solution

The fourth proportional to 76,813.36, 115,635 and 69,088.98 is: 104,006.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,813.36 : 115,635 = 69,088.98 : x
  2. Step 2: Convert to fraction form
    76,813.36/115,635 = 69,088.98/x
  3. Step 3: Cross multiply
    76,813.36x = 115,635 × 69,088.98
  4. Step 4: Simplify right side
    76,813.36x = 7,989,104,202.30
  5. Step 5: Solve for x
    x = 7,989,104,202.30/76,813.36
  6. Step 6: Final answer
    x = 104,006.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.