Home / 105,721.14-145,971.69-68,061

Finding the Fourth Proportional to 105,721.14, 145,971.69 and 68,061

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Solution

The fourth proportional to 105,721.14, 145,971.69 and 68,061 is: 93,973.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,721.14 : 145,971.69 = 68,061 : x
  2. Step 2: Convert to fraction form
    105,721.14/145,971.69 = 68,061/x
  3. Step 3: Cross multiply
    105,721.14x = 145,971.69 × 68,061
  4. Step 4: Simplify right side
    105,721.14x = 9,934,979,193.09
  5. Step 5: Solve for x
    x = 9,934,979,193.09/105,721.14
  6. Step 6: Final answer
    x = 93,973.44

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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.