Home / 405,078.12-607,241.55-138,775.35

Finding the Fourth Proportional to 405,078.12, 607,241.55 and 138,775.35

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Solution

The fourth proportional to 405,078.12, 607,241.55 and 138,775.35 is: 208,034.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,078.12 : 607,241.55 = 138,775.35 : x
  2. Step 2: Convert to fraction form
    405,078.12/607,241.55 = 138,775.35/x
  3. Step 3: Cross multiply
    405,078.12x = 607,241.55 × 138,775.35
  4. Step 4: Simplify right side
    405,078.12x = 84,270,158,635.79
  5. Step 5: Solve for x
    x = 84,270,158,635.79/405,078.12
  6. Step 6: Final answer
    x = 208,034.34

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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.