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Finding the Fourth Proportional to 128,305.01, 177,053.75 and 70,941.02

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Solution

The fourth proportional to 128,305.01, 177,053.75 and 70,941.02 is: 97,894.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,305.01 : 177,053.75 = 70,941.02 : x
  2. Step 2: Convert to fraction form
    128,305.01/177,053.75 = 70,941.02/x
  3. Step 3: Cross multiply
    128,305.01x = 177,053.75 × 70,941.02
  4. Step 4: Simplify right side
    128,305.01x = 12,560,372,645.88
  5. Step 5: Solve for x
    x = 12,560,372,645.88/128,305.01
  6. Step 6: Final answer
    x = 97,894.64

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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.