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Finding the Fourth Proportional to 91,886.88, 126,710.56 and 86,529.28

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Solution

The fourth proportional to 91,886.88, 126,710.56 and 86,529.28 is: 119,322.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,886.88 : 126,710.56 = 86,529.28 : x
  2. Step 2: Convert to fraction form
    91,886.88/126,710.56 = 86,529.28/x
  3. Step 3: Cross multiply
    91,886.88x = 126,710.56 × 86,529.28
  4. Step 4: Simplify right side
    91,886.88x = 10,964,173,525.20
  5. Step 5: Solve for x
    x = 10,964,173,525.20/91,886.88
  6. Step 6: Final answer
    x = 119,322.51

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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.