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Finding the Fourth Proportional to 100,302.81, 138,413.71 and 59,992.75

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Solution

The fourth proportional to 100,302.81, 138,413.71 and 59,992.75 is: 82,787.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,302.81 : 138,413.71 = 59,992.75 : x
  2. Step 2: Convert to fraction form
    100,302.81/138,413.71 = 59,992.75/x
  3. Step 3: Cross multiply
    100,302.81x = 138,413.71 × 59,992.75
  4. Step 4: Simplify right side
    100,302.81x = 8,303,819,348.61
  5. Step 5: Solve for x
    x = 8,303,819,348.61/100,302.81
  6. Step 6: Final answer
    x = 82,787.51

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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.