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Finding the Fourth Proportional to 85,798.50, 128,706.66 and 23,469

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Solution

The fourth proportional to 85,798.50, 128,706.66 and 23,469 is: 35,205.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,798.50 : 128,706.66 = 23,469 : x
  2. Step 2: Convert to fraction form
    85,798.50/128,706.66 = 23,469/x
  3. Step 3: Cross multiply
    85,798.50x = 128,706.66 × 23,469
  4. Step 4: Simplify right side
    85,798.50x = 3,020,616,603.54
  5. Step 5: Solve for x
    x = 3,020,616,603.54/85,798.50
  6. Step 6: Final answer
    x = 35,205.94

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1.5x scale

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.