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Finding the Fourth Proportional to 65,957.76, 91,031.04 and 40,815.36

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Solution

The fourth proportional to 65,957.76, 91,031.04 and 40,815.36 is: 56,330.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,957.76 : 91,031.04 = 40,815.36 : x
  2. Step 2: Convert to fraction form
    65,957.76/91,031.04 = 40,815.36/x
  3. Step 3: Cross multiply
    65,957.76x = 91,031.04 × 40,815.36
  4. Step 4: Simplify right side
    65,957.76x = 3,715,464,668.77
  5. Step 5: Solve for x
    x = 3,715,464,668.77/65,957.76
  6. Step 6: Final answer
    x = 56,330.97

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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.