Home / 81,515.51-112,373.28-57,242.54

Finding the Fourth Proportional to 81,515.51, 112,373.28 and 57,242.54

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Solution

The fourth proportional to 81,515.51, 112,373.28 and 57,242.54 is: 78,911.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,515.51 : 112,373.28 = 57,242.54 : x
  2. Step 2: Convert to fraction form
    81,515.51/112,373.28 = 57,242.54/x
  3. Step 3: Cross multiply
    81,515.51x = 112,373.28 × 57,242.54
  4. Step 4: Simplify right side
    81,515.51x = 6,432,531,413.46
  5. Step 5: Solve for x
    x = 6,432,531,413.46/81,515.51
  6. Step 6: Final answer
    x = 78,911.75

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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.