Home / 78,106.46-117,135.47-28,180.07

Finding the Fourth Proportional to 78,106.46, 117,135.47 and 28,180.07

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Solution

The fourth proportional to 78,106.46, 117,135.47 and 28,180.07 is: 42,261.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,106.46 : 117,135.47 = 28,180.07 : x
  2. Step 2: Convert to fraction form
    78,106.46/117,135.47 = 28,180.07/x
  3. Step 3: Cross multiply
    78,106.46x = 117,135.47 × 28,180.07
  4. Step 4: Simplify right side
    78,106.46x = 3,300,885,603.18
  5. Step 5: Solve for x
    x = 3,300,885,603.18/78,106.46
  6. Step 6: Final answer
    x = 42,261.36

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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.