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Finding the Fourth Proportional to 128,241.63, 176,973.51 and 71,653

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Solution

The fourth proportional to 128,241.63, 176,973.51 and 71,653 is: 98,881.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,241.63 : 176,973.51 = 71,653 : x
  2. Step 2: Convert to fraction form
    128,241.63/176,973.51 = 71,653/x
  3. Step 3: Cross multiply
    128,241.63x = 176,973.51 × 71,653
  4. Step 4: Simplify right side
    128,241.63x = 12,680,682,912.03
  5. Step 5: Solve for x
    x = 12,680,682,912.03/128,241.63
  6. Step 6: Final answer
    x = 98,881.18

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1.5x scale

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.