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Finding the Fourth Proportional to 112,080, 154,670.40 and 67,368

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Solution

The fourth proportional to 112,080, 154,670.40 and 67,368 is: 92,967.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,080 : 154,670.40 = 67,368 : x
  2. Step 2: Convert to fraction form
    112,080/154,670.40 = 67,368/x
  3. Step 3: Cross multiply
    112,080x = 154,670.40 × 67,368
  4. Step 4: Simplify right side
    112,080x = 10,419,835,507.20
  5. Step 5: Solve for x
    x = 10,419,835,507.20/112,080
  6. Step 6: Final answer
    x = 92,967.84

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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.