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Finding the Fourth Proportional to 105,679.17, 145,840.05 and 57,934.29

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Solution

The fourth proportional to 105,679.17, 145,840.05 and 57,934.29 is: 79,950.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,679.17 : 145,840.05 = 57,934.29 : x
  2. Step 2: Convert to fraction form
    105,679.17/145,840.05 = 57,934.29/x
  3. Step 3: Cross multiply
    105,679.17x = 145,840.05 × 57,934.29
  4. Step 4: Simplify right side
    105,679.17x = 8,449,139,750.31
  5. Step 5: Solve for x
    x = 8,449,139,750.31/105,679.17
  6. Step 6: Final answer
    x = 79,950.85

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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.