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Finding the Fourth Proportional to 70,973.46, 106,443.78 and 21,041.51

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Solution

The fourth proportional to 70,973.46, 106,443.78 and 21,041.51 is: 31,557.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,973.46 : 106,443.78 = 21,041.51 : x
  2. Step 2: Convert to fraction form
    70,973.46/106,443.78 = 21,041.51/x
  3. Step 3: Cross multiply
    70,973.46x = 106,443.78 × 21,041.51
  4. Step 4: Simplify right side
    70,973.46x = 2,239,737,861.31
  5. Step 5: Solve for x
    x = 2,239,737,861.31/70,973.46
  6. Step 6: Final answer
    x = 31,557.40

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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.