Home / 154,106.20-212,681.87-90,442.63

Finding the Fourth Proportional to 154,106.20, 212,681.87 and 90,442.63

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Solution

The fourth proportional to 154,106.20, 212,681.87 and 90,442.63 is: 124,819.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,106.20 : 212,681.87 = 90,442.63 : x
  2. Step 2: Convert to fraction form
    154,106.20/212,681.87 = 90,442.63/x
  3. Step 3: Cross multiply
    154,106.20x = 212,681.87 × 90,442.63
  4. Step 4: Simplify right side
    154,106.20x = 19,235,507,676.12
  5. Step 5: Solve for x
    x = 19,235,507,676.12/154,106.20
  6. Step 6: Final answer
    x = 124,819.82

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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.