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Finding the Fourth Proportional to 128,309.60, 177,051.79 and 70,941.17

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Solution

The fourth proportional to 128,309.60, 177,051.79 and 70,941.17 is: 97,890.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309.60 : 177,051.79 = 70,941.17 : x
  2. Step 2: Convert to fraction form
    128,309.60/177,051.79 = 70,941.17/x
  3. Step 3: Cross multiply
    128,309.60x = 177,051.79 × 70,941.17
  4. Step 4: Simplify right side
    128,309.60x = 12,560,259,893.23
  5. Step 5: Solve for x
    x = 12,560,259,893.23/128,309.60
  6. Step 6: Final answer
    x = 97,890.26

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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.