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Finding the Fourth Proportional to 99,992.64, 149,988.96 and 69,024.72

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Solution

The fourth proportional to 99,992.64, 149,988.96 and 69,024.72 is: 103,537.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,992.64 : 149,988.96 = 69,024.72 : x
  2. Step 2: Convert to fraction form
    99,992.64/149,988.96 = 69,024.72/x
  3. Step 3: Cross multiply
    99,992.64x = 149,988.96 × 69,024.72
  4. Step 4: Simplify right side
    99,992.64x = 10,352,945,967.09
  5. Step 5: Solve for x
    x = 10,352,945,967.09/99,992.64
  6. Step 6: Final answer
    x = 103,537.08

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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.