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Finding the Fourth Proportional to 127,994.40, 176,631.60 and 71,405.64

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Solution

The fourth proportional to 127,994.40, 176,631.60 and 71,405.64 is: 98,539.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,994.40 : 176,631.60 = 71,405.64 : x
  2. Step 2: Convert to fraction form
    127,994.40/176,631.60 = 71,405.64/x
  3. Step 3: Cross multiply
    127,994.40x = 176,631.60 × 71,405.64
  4. Step 4: Simplify right side
    127,994.40x = 12,612,492,442.22
  5. Step 5: Solve for x
    x = 12,612,492,442.22/127,994.40
  6. Step 6: Final answer
    x = 98,539.41

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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.