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Finding the Fourth Proportional to 80,698.51, 121,023.15 and 64,866.00

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Solution

The fourth proportional to 80,698.51, 121,023.15 and 64,866.00 is: 97,279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,698.51 : 121,023.15 = 64,866.00 : x
  2. Step 2: Convert to fraction form
    80,698.51/121,023.15 = 64,866.00/x
  3. Step 3: Cross multiply
    80,698.51x = 121,023.15 × 64,866.00
  4. Step 4: Simplify right side
    80,698.51x = 7,850,286,837.36
  5. Step 5: Solve for x
    x = 7,850,286,837.36/80,698.51
  6. Step 6: Final answer
    x = 97,279.21

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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.