Home / 81,986.51-122,897.75-70,696.13

Finding the Fourth Proportional to 81,986.51, 122,897.75 and 70,696.13

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Solution

The fourth proportional to 81,986.51, 122,897.75 and 70,696.13 is: 105,973.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,986.51 : 122,897.75 = 70,696.13 : x
  2. Step 2: Convert to fraction form
    81,986.51/122,897.75 = 70,696.13/x
  3. Step 3: Cross multiply
    81,986.51x = 122,897.75 × 70,696.13
  4. Step 4: Simplify right side
    81,986.51x = 8,688,394,342.74
  5. Step 5: Solve for x
    x = 8,688,394,342.74/81,986.51
  6. Step 6: Final answer
    x = 105,973.46

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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.