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Finding the Fourth Proportional to 74,735.52, 112,132.44 and 43,128.89

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Solution

The fourth proportional to 74,735.52, 112,132.44 and 43,128.89 is: 64,710.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,735.52 : 112,132.44 = 43,128.89 : x
  2. Step 2: Convert to fraction form
    74,735.52/112,132.44 = 43,128.89/x
  3. Step 3: Cross multiply
    74,735.52x = 112,132.44 × 43,128.89
  4. Step 4: Simplify right side
    74,735.52x = 4,836,147,670.19
  5. Step 5: Solve for x
    x = 4,836,147,670.19/74,735.52
  6. Step 6: Final answer
    x = 64,710.16

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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.