Home / 78,090.24-117,136.80-28,174.08

Finding the Fourth Proportional to 78,090.24, 117,136.80 and 28,174.08

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Solution

The fourth proportional to 78,090.24, 117,136.80 and 28,174.08 is: 42,261.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,090.24 : 117,136.80 = 28,174.08 : x
  2. Step 2: Convert to fraction form
    78,090.24/117,136.80 = 28,174.08/x
  3. Step 3: Cross multiply
    78,090.24x = 117,136.80 × 28,174.08
  4. Step 4: Simplify right side
    78,090.24x = 3,300,221,574.14
  5. Step 5: Solve for x
    x = 3,300,221,574.14/78,090.24
  6. Step 6: Final answer
    x = 42,261.64

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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.