Home / 154,844-213,689.04-87,780.32

Finding the Fourth Proportional to 154,844, 213,689.04 and 87,780.32

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Solution

The fourth proportional to 154,844, 213,689.04 and 87,780.32 is: 121,139.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,844 : 213,689.04 = 87,780.32 : x
  2. Step 2: Convert to fraction form
    154,844/213,689.04 = 87,780.32/x
  3. Step 3: Cross multiply
    154,844x = 213,689.04 × 87,780.32
  4. Step 4: Simplify right side
    154,844x = 18,757,692,311.69
  5. Step 5: Solve for x
    x = 18,757,692,311.69/154,844
  6. Step 6: Final answer
    x = 121,139.29

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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.