Home / 78,090.26-107,764.07-42,280.16

Finding the Fourth Proportional to 78,090.26, 107,764.07 and 42,280.16

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Solution

The fourth proportional to 78,090.26, 107,764.07 and 42,280.16 is: 58,346.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,090.26 : 107,764.07 = 42,280.16 : x
  2. Step 2: Convert to fraction form
    78,090.26/107,764.07 = 42,280.16/x
  3. Step 3: Cross multiply
    78,090.26x = 107,764.07 × 42,280.16
  4. Step 4: Simplify right side
    78,090.26x = 4,556,281,371.63
  5. Step 5: Solve for x
    x = 4,556,281,371.63/78,090.26
  6. Step 6: Final answer
    x = 58,346.35

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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.