Home / 105,531.45-145,633.64-57,133.89

Finding the Fourth Proportional to 105,531.45, 145,633.64 and 57,133.89

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Solution

The fourth proportional to 105,531.45, 145,633.64 and 57,133.89 is: 78,844.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,531.45 : 145,633.64 = 57,133.89 : x
  2. Step 2: Convert to fraction form
    105,531.45/145,633.64 = 57,133.89/x
  3. Step 3: Cross multiply
    105,531.45x = 145,633.64 × 57,133.89
  4. Step 4: Simplify right side
    105,531.45x = 8,320,616,368.06
  5. Step 5: Solve for x
    x = 8,320,616,368.06/105,531.45
  6. Step 6: Final answer
    x = 78,844.90

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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.