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Finding the Fourth Proportional to 143,483.47, 215,028.31 and 90,798.64

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Solution

The fourth proportional to 143,483.47, 215,028.31 and 90,798.64 is: 136,073.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,483.47 : 215,028.31 = 90,798.64 : x
  2. Step 2: Convert to fraction form
    143,483.47/215,028.31 = 90,798.64/x
  3. Step 3: Cross multiply
    143,483.47x = 215,028.31 × 90,798.64
  4. Step 4: Simplify right side
    143,483.47x = 19,524,278,109.50
  5. Step 5: Solve for x
    x = 19,524,278,109.50/143,483.47
  6. Step 6: Final answer
    x = 136,073.36

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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.