Home / 145,128.90-200,252.61-81,469.38

Finding the Fourth Proportional to 145,128.90, 200,252.61 and 81,469.38

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Solution

The fourth proportional to 145,128.90, 200,252.61 and 81,469.38 is: 112,413.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,128.90 : 200,252.61 = 81,469.38 : x
  2. Step 2: Convert to fraction form
    145,128.90/200,252.61 = 81,469.38/x
  3. Step 3: Cross multiply
    145,128.90x = 200,252.61 × 81,469.38
  4. Step 4: Simplify right side
    145,128.90x = 16,314,455,980.08
  5. Step 5: Solve for x
    x = 16,314,455,980.08/145,128.90
  6. Step 6: Final answer
    x = 112,413.56

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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.