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Finding the Fourth Proportional to 103,706.65, 143,077.75 and 67,917.07

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Solution

The fourth proportional to 103,706.65, 143,077.75 and 67,917.07 is: 93,701.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,706.65 : 143,077.75 = 67,917.07 : x
  2. Step 2: Convert to fraction form
    103,706.65/143,077.75 = 67,917.07/x
  3. Step 3: Cross multiply
    103,706.65x = 143,077.75 × 67,917.07
  4. Step 4: Simplify right side
    103,706.65x = 9,717,421,562.19
  5. Step 5: Solve for x
    x = 9,717,421,562.19/103,706.65
  6. Step 6: Final answer
    x = 93,701.05

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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.