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Finding the Fourth Proportional to 128,803.02, 193,165.15 and 89,077.29

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Solution

The fourth proportional to 128,803.02, 193,165.15 and 89,077.29 is: 133,588.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,803.02 : 193,165.15 = 89,077.29 : x
  2. Step 2: Convert to fraction form
    128,803.02/193,165.15 = 89,077.29/x
  3. Step 3: Cross multiply
    128,803.02x = 193,165.15 × 89,077.29
  4. Step 4: Simplify right side
    128,803.02x = 17,206,628,084.44
  5. Step 5: Solve for x
    x = 17,206,628,084.44/128,803.02
  6. Step 6: Final answer
    x = 133,588.70

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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.