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Finding the Fourth Proportional to 89,169.84, 132,957.54 and 86,720.40

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Solution

The fourth proportional to 89,169.84, 132,957.54 and 86,720.40 is: 129,305.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,169.84 : 132,957.54 = 86,720.40 : x
  2. Step 2: Convert to fraction form
    89,169.84/132,957.54 = 86,720.40/x
  3. Step 3: Cross multiply
    89,169.84x = 132,957.54 × 86,720.40
  4. Step 4: Simplify right side
    89,169.84x = 11,530,131,051.82
  5. Step 5: Solve for x
    x = 11,530,131,051.82/89,169.84
  6. Step 6: Final answer
    x = 129,305.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.