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Finding the Fourth Proportional to 70,957.84, 106,436.22 and 21,038.08

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Solution

The fourth proportional to 70,957.84, 106,436.22 and 21,038.08 is: 31,556.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,957.84 : 106,436.22 = 21,038.08 : x
  2. Step 2: Convert to fraction form
    70,957.84/106,436.22 = 21,038.08/x
  3. Step 3: Cross multiply
    70,957.84x = 106,436.22 × 21,038.08
  4. Step 4: Simplify right side
    70,957.84x = 2,239,213,711.26
  5. Step 5: Solve for x
    x = 2,239,213,711.26/70,957.84
  6. Step 6: Final answer
    x = 31,556.96

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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.