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Finding the Fourth Proportional to 81,571.67, 112,569.09 and 47,603.51

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Solution

The fourth proportional to 81,571.67, 112,569.09 and 47,603.51 is: 65,692.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,571.67 : 112,569.09 = 47,603.51 : x
  2. Step 2: Convert to fraction form
    81,571.67/112,569.09 = 47,603.51/x
  3. Step 3: Cross multiply
    81,571.67x = 112,569.09 × 47,603.51
  4. Step 4: Simplify right side
    81,571.67x = 5,358,683,801.51
  5. Step 5: Solve for x
    x = 5,358,683,801.51/81,571.67
  6. Step 6: Final answer
    x = 65,692.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.