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Finding the Fourth Proportional to 128,347.50, 192,599.02 and 54,475.50

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Solution

The fourth proportional to 128,347.50, 192,599.02 and 54,475.50 is: 81,746.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,347.50 : 192,599.02 = 54,475.50 : x
  2. Step 2: Convert to fraction form
    128,347.50/192,599.02 = 54,475.50/x
  3. Step 3: Cross multiply
    128,347.50x = 192,599.02 × 54,475.50
  4. Step 4: Simplify right side
    128,347.50x = 10,491,927,914.01
  5. Step 5: Solve for x
    x = 10,491,927,914.01/128,347.50
  6. Step 6: Final answer
    x = 81,746.26

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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.