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Finding the Fourth Proportional to 104,116.65, 143,680.80 and 56,370

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Solution

The fourth proportional to 104,116.65, 143,680.80 and 56,370 is: 77,790.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,116.65 : 143,680.80 = 56,370 : x
  2. Step 2: Convert to fraction form
    104,116.65/143,680.80 = 56,370/x
  3. Step 3: Cross multiply
    104,116.65x = 143,680.80 × 56,370
  4. Step 4: Simplify right side
    104,116.65x = 8,099,286,696.00
  5. Step 5: Solve for x
    x = 8,099,286,696.00/104,116.65
  6. Step 6: Final answer
    x = 77,790.50

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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.