Home / 154,343.52-213,021.32-90,681.28

Finding the Fourth Proportional to 154,343.52, 213,021.32 and 90,681.28

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Solution

The fourth proportional to 154,343.52, 213,021.32 and 90,681.28 is: 125,156.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,343.52 : 213,021.32 = 90,681.28 : x
  2. Step 2: Convert to fraction form
    154,343.52/213,021.32 = 90,681.28/x
  3. Step 3: Cross multiply
    154,343.52x = 213,021.32 × 90,681.28
  4. Step 4: Simplify right side
    154,343.52x = 19,317,045,964.89
  5. Step 5: Solve for x
    x = 19,317,045,964.89/154,343.52
  6. Step 6: Final answer
    x = 125,156.18

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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.