Home / 78,717.01-108,628.80-42,907.03

Finding the Fourth Proportional to 78,717.01, 108,628.80 and 42,907.03

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Solution

The fourth proportional to 78,717.01, 108,628.80 and 42,907.03 is: 59,211.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,717.01 : 108,628.80 = 42,907.03 : x
  2. Step 2: Convert to fraction form
    78,717.01/108,628.80 = 42,907.03/x
  3. Step 3: Cross multiply
    78,717.01x = 108,628.80 × 42,907.03
  4. Step 4: Simplify right side
    78,717.01x = 4,660,939,180.46
  5. Step 5: Solve for x
    x = 4,660,939,180.46/78,717.01
  6. Step 6: Final answer
    x = 59,211.33

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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.