Home / 81,502.02-122,288.10-39,413.76

Finding the Fourth Proportional to 81,502.02, 122,288.10 and 39,413.76

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Solution

The fourth proportional to 81,502.02, 122,288.10 and 39,413.76 is: 59,137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,502.02 : 122,288.10 = 39,413.76 : x
  2. Step 2: Convert to fraction form
    81,502.02/122,288.10 = 39,413.76/x
  3. Step 3: Cross multiply
    81,502.02x = 122,288.10 × 39,413.76
  4. Step 4: Simplify right side
    81,502.02x = 4,819,833,824.26
  5. Step 5: Solve for x
    x = 4,819,833,824.26/81,502.02
  6. Step 6: Final answer
    x = 59,137.60

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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.