Home / 81,276.40-121,952.94-28,710.64

Finding the Fourth Proportional to 81,276.40, 121,952.94 and 28,710.64

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Solution

The fourth proportional to 81,276.40, 121,952.94 and 28,710.64 is: 43,079.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,276.40 : 121,952.94 = 28,710.64 : x
  2. Step 2: Convert to fraction form
    81,276.40/121,952.94 = 28,710.64/x
  3. Step 3: Cross multiply
    81,276.40x = 121,952.94 × 28,710.64
  4. Step 4: Simplify right side
    81,276.40x = 3,501,346,957.28
  5. Step 5: Solve for x
    x = 3,501,346,957.28/81,276.40
  6. Step 6: Final answer
    x = 43,079.50

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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.