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Finding the Fourth Proportional to 216,686.40, 325,221.60 and 127,828.80

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Solution

The fourth proportional to 216,686.40, 325,221.60 and 127,828.80 is: 191,856.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,686.40 : 325,221.60 = 127,828.80 : x
  2. Step 2: Convert to fraction form
    216,686.40/325,221.60 = 127,828.80/x
  3. Step 3: Cross multiply
    216,686.40x = 325,221.60 × 127,828.80
  4. Step 4: Simplify right side
    216,686.40x = 41,572,686,862.08
  5. Step 5: Solve for x
    x = 41,572,686,862.08/216,686.40
  6. Step 6: Final answer
    x = 191,856.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.