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Finding the Fourth Proportional to 74,960.88, 112,424.76 and 21,641.28

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Solution

The fourth proportional to 74,960.88, 112,424.76 and 21,641.28 is: 32,457.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,960.88 : 112,424.76 = 21,641.28 : x
  2. Step 2: Convert to fraction form
    74,960.88/112,424.76 = 21,641.28/x
  3. Step 3: Cross multiply
    74,960.88x = 112,424.76 × 21,641.28
  4. Step 4: Simplify right side
    74,960.88x = 2,433,015,553.40
  5. Step 5: Solve for x
    x = 2,433,015,553.40/74,960.88
  6. Step 6: Final answer
    x = 32,457.14

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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.