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Finding the Fourth Proportional to 153,579.64, 211,942.02 and 85,594.72

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Solution

The fourth proportional to 153,579.64, 211,942.02 and 85,594.72 is: 118,121.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,579.64 : 211,942.02 = 85,594.72 : x
  2. Step 2: Convert to fraction form
    153,579.64/211,942.02 = 85,594.72/x
  3. Step 3: Cross multiply
    153,579.64x = 211,942.02 × 85,594.72
  4. Step 4: Simplify right side
    153,579.64x = 18,141,117,858.13
  5. Step 5: Solve for x
    x = 18,141,117,858.13/153,579.64
  6. Step 6: Final answer
    x = 118,121.89

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Why These Related Problems?

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