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Finding the Fourth Proportional to 178,072.98, 245,742.15 and 105,479.88

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Solution

The fourth proportional to 178,072.98, 245,742.15 and 105,479.88 is: 145,563.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,072.98 : 245,742.15 = 105,479.88 : x
  2. Step 2: Convert to fraction form
    178,072.98/245,742.15 = 105,479.88/x
  3. Step 3: Cross multiply
    178,072.98x = 245,742.15 × 105,479.88
  4. Step 4: Simplify right side
    178,072.98x = 25,920,852,492.94
  5. Step 5: Solve for x
    x = 25,920,852,492.94/178,072.98
  6. Step 6: Final answer
    x = 145,563.09

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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.