Home / 121,431.40-182,147.10-74,775.40

Finding the Fourth Proportional to 121,431.40, 182,147.10 and 74,775.40

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Solution

The fourth proportional to 121,431.40, 182,147.10 and 74,775.40 is: 112,163.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,431.40 : 182,147.10 = 74,775.40 : x
  2. Step 2: Convert to fraction form
    121,431.40/182,147.10 = 74,775.40/x
  3. Step 3: Cross multiply
    121,431.40x = 182,147.10 × 74,775.40
  4. Step 4: Simplify right side
    121,431.40x = 13,620,122,261.34
  5. Step 5: Solve for x
    x = 13,620,122,261.34/121,431.40
  6. Step 6: Final answer
    x = 112,163.10

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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.