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Finding the Fourth Proportional to 128,533.40, 192,800.10 and 115,443.80

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Solution

The fourth proportional to 128,533.40, 192,800.10 and 115,443.80 is: 173,165.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,533.40 : 192,800.10 = 115,443.80 : x
  2. Step 2: Convert to fraction form
    128,533.40/192,800.10 = 115,443.80/x
  3. Step 3: Cross multiply
    128,533.40x = 192,800.10 × 115,443.80
  4. Step 4: Simplify right side
    128,533.40x = 22,257,576,184.38
  5. Step 5: Solve for x
    x = 22,257,576,184.38/128,533.40
  6. Step 6: Final answer
    x = 173,165.70

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1.5x scale

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.