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Finding the Fourth Proportional to 75,985.79, 104,860.19 and 42,451.79

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Solution

The fourth proportional to 75,985.79, 104,860.19 and 42,451.79 is: 58,583.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,985.79 : 104,860.19 = 42,451.79 : x
  2. Step 2: Convert to fraction form
    75,985.79/104,860.19 = 42,451.79/x
  3. Step 3: Cross multiply
    75,985.79x = 104,860.19 × 42,451.79
  4. Step 4: Simplify right side
    75,985.79x = 4,451,502,552.98
  5. Step 5: Solve for x
    x = 4,451,502,552.98/75,985.79
  6. Step 6: Final answer
    x = 58,583.36

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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.