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Finding the Fourth Proportional to 91,957.80, 126,917.48 and 53,721.80

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Solution

The fourth proportional to 91,957.80, 126,917.48 and 53,721.80 is: 74,145.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,957.80 : 126,917.48 = 53,721.80 : x
  2. Step 2: Convert to fraction form
    91,957.80/126,917.48 = 53,721.80/x
  3. Step 3: Cross multiply
    91,957.80x = 126,917.48 × 53,721.80
  4. Step 4: Simplify right side
    91,957.80x = 6,818,235,477.06
  5. Step 5: Solve for x
    x = 6,818,235,477.06/91,957.80
  6. Step 6: Final answer
    x = 74,145.27

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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.