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Finding the Fourth Proportional to 70,964, 106,433.76 and 21,043.52

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Solution

The fourth proportional to 70,964, 106,433.76 and 21,043.52 is: 31,561.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,964 : 106,433.76 = 21,043.52 : x
  2. Step 2: Convert to fraction form
    70,964/106,433.76 = 21,043.52/x
  3. Step 3: Cross multiply
    70,964x = 106,433.76 × 21,043.52
  4. Step 4: Simplify right side
    70,964x = 2,239,740,957.24
  5. Step 5: Solve for x
    x = 2,239,740,957.24/70,964
  6. Step 6: Final answer
    x = 31,561.65

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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.