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Finding the Fourth Proportional to 138,413.60, 207,328.80 and 112,169.60

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Solution

The fourth proportional to 138,413.60, 207,328.80 and 112,169.60 is: 168,018.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,413.60 : 207,328.80 = 112,169.60 : x
  2. Step 2: Convert to fraction form
    138,413.60/207,328.80 = 112,169.60/x
  3. Step 3: Cross multiply
    138,413.60x = 207,328.80 × 112,169.60
  4. Step 4: Simplify right side
    138,413.60x = 23,255,988,564.48
  5. Step 5: Solve for x
    x = 23,255,988,564.48/138,413.60
  6. Step 6: Final answer
    x = 168,018.09

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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.