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Finding the Fourth Proportional to 85,381.41, 117,859.59 and 76,413.34

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Solution

The fourth proportional to 85,381.41, 117,859.59 and 76,413.34 is: 105,480.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,381.41 : 117,859.59 = 76,413.34 : x
  2. Step 2: Convert to fraction form
    85,381.41/117,859.59 = 76,413.34/x
  3. Step 3: Cross multiply
    85,381.41x = 117,859.59 × 76,413.34
  4. Step 4: Simplify right side
    85,381.41x = 9,006,044,628.28
  5. Step 5: Solve for x
    x = 9,006,044,628.28/85,381.41
  6. Step 6: Final answer
    x = 105,480.16

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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.