Home / 123,431.20-185,146.80-113,808.40

Finding the Fourth Proportional to 123,431.20, 185,146.80 and 113,808.40

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Solution

The fourth proportional to 123,431.20, 185,146.80 and 113,808.40 is: 170,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,431.20 : 185,146.80 = 113,808.40 : x
  2. Step 2: Convert to fraction form
    123,431.20/185,146.80 = 113,808.40/x
  3. Step 3: Cross multiply
    123,431.20x = 185,146.80 × 113,808.40
  4. Step 4: Simplify right side
    123,431.20x = 21,071,261,073.12
  5. Step 5: Solve for x
    x = 21,071,261,073.12/123,431.20
  6. Step 6: Final answer
    x = 170,712.60

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1.5x scale

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.