Home / 136,871.51-188,878.84-76,440.38

Finding the Fourth Proportional to 136,871.51, 188,878.84 and 76,440.38

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Solution

The fourth proportional to 136,871.51, 188,878.84 and 76,440.38 is: 105,485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,871.51 : 188,878.84 = 76,440.38 : x
  2. Step 2: Convert to fraction form
    136,871.51/188,878.84 = 76,440.38/x
  3. Step 3: Cross multiply
    136,871.51x = 188,878.84 × 76,440.38
  4. Step 4: Simplify right side
    136,871.51x = 14,437,969,168.06
  5. Step 5: Solve for x
    x = 14,437,969,168.06/136,871.51
  6. Step 6: Final answer
    x = 105,485.57

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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.