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Finding the Fourth Proportional to 92,980, 139,975.99 and 84,713.14

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Solution

The fourth proportional to 92,980, 139,975.99 and 84,713.14 is: 127,530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,980 : 139,975.99 = 84,713.14 : x
  2. Step 2: Convert to fraction form
    92,980/139,975.99 = 84,713.14/x
  3. Step 3: Cross multiply
    92,980x = 139,975.99 × 84,713.14
  4. Step 4: Simplify right side
    92,980x = 11,857,805,637.51
  5. Step 5: Solve for x
    x = 11,857,805,637.51/92,980
  6. Step 6: Final answer
    x = 127,530.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.