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Finding the Fourth Proportional to 84,390.51, 116,404 and 54,127.87

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Solution

The fourth proportional to 84,390.51, 116,404 and 54,127.87 is: 74,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,390.51 : 116,404 = 54,127.87 : x
  2. Step 2: Convert to fraction form
    84,390.51/116,404 = 54,127.87/x
  3. Step 3: Cross multiply
    84,390.51x = 116,404 × 54,127.87
  4. Step 4: Simplify right side
    84,390.51x = 6,300,700,579.48
  5. Step 5: Solve for x
    x = 6,300,700,579.48/84,390.51
  6. Step 6: Final answer
    x = 74,661.25

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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.