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Finding the Fourth Proportional to 128,653.84, 177,542.04 and 72,064

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Solution

The fourth proportional to 128,653.84, 177,542.04 and 72,064 is: 99,448.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,653.84 : 177,542.04 = 72,064 : x
  2. Step 2: Convert to fraction form
    128,653.84/177,542.04 = 72,064/x
  3. Step 3: Cross multiply
    128,653.84x = 177,542.04 × 72,064
  4. Step 4: Simplify right side
    128,653.84x = 12,794,389,570.56
  5. Step 5: Solve for x
    x = 12,794,389,570.56/128,653.84
  6. Step 6: Final answer
    x = 99,448.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.