Home / 154,656.07-213,421.83-90,121.20

Finding the Fourth Proportional to 154,656.07, 213,421.83 and 90,121.20

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Solution

The fourth proportional to 154,656.07, 213,421.83 and 90,121.20 is: 124,365.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,656.07 : 213,421.83 = 90,121.20 : x
  2. Step 2: Convert to fraction form
    154,656.07/213,421.83 = 90,121.20/x
  3. Step 3: Cross multiply
    154,656.07x = 213,421.83 × 90,121.20
  4. Step 4: Simplify right side
    154,656.07x = 19,233,831,425.80
  5. Step 5: Solve for x
    x = 19,233,831,425.80/154,656.07
  6. Step 6: Final answer
    x = 124,365.19

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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.