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Finding the Fourth Proportional to 86,127.30, 118,966.05 and 66,228.30

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Solution

The fourth proportional to 86,127.30, 118,966.05 and 66,228.30 is: 91,479.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,127.30 : 118,966.05 = 66,228.30 : x
  2. Step 2: Convert to fraction form
    86,127.30/118,966.05 = 66,228.30/x
  3. Step 3: Cross multiply
    86,127.30x = 118,966.05 × 66,228.30
  4. Step 4: Simplify right side
    86,127.30x = 7,878,919,249.22
  5. Step 5: Solve for x
    x = 7,878,919,249.22/86,127.30
  6. Step 6: Final answer
    x = 91,479.93

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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.