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Finding the Fourth Proportional to 203,148.60, 304,785.12 and 90,923.28

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Solution

The fourth proportional to 203,148.60, 304,785.12 and 90,923.28 is: 136,412.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,148.60 : 304,785.12 = 90,923.28 : x
  2. Step 2: Convert to fraction form
    203,148.60/304,785.12 = 90,923.28/x
  3. Step 3: Cross multiply
    203,148.60x = 304,785.12 × 90,923.28
  4. Step 4: Simplify right side
    203,148.60x = 27,712,062,805.59
  5. Step 5: Solve for x
    x = 27,712,062,805.59/203,148.60
  6. Step 6: Final answer
    x = 136,412.77

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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.