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Finding the Fourth Proportional to 99,122, 136,805.64 and 56,682.32

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Solution

The fourth proportional to 99,122, 136,805.64 and 56,682.32 is: 78,231.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,122 : 136,805.64 = 56,682.32 : x
  2. Step 2: Convert to fraction form
    99,122/136,805.64 = 56,682.32/x
  3. Step 3: Cross multiply
    99,122x = 136,805.64 × 56,682.32
  4. Step 4: Simplify right side
    99,122x = 7,754,461,064.28
  5. Step 5: Solve for x
    x = 7,754,461,064.28/99,122
  6. Step 6: Final answer
    x = 78,231.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.