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Finding the Fourth Proportional to 81,885.60, 122,828.40 and 40,413.60

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Solution

The fourth proportional to 81,885.60, 122,828.40 and 40,413.60 is: 60,620.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,885.60 : 122,828.40 = 40,413.60 : x
  2. Step 2: Convert to fraction form
    81,885.60/122,828.40 = 40,413.60/x
  3. Step 3: Cross multiply
    81,885.60x = 122,828.40 × 40,413.60
  4. Step 4: Simplify right side
    81,885.60x = 4,963,937,826.24
  5. Step 5: Solve for x
    x = 4,963,937,826.24/81,885.60
  6. Step 6: Final answer
    x = 60,620.40

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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.