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Finding the Fourth Proportional to 210,558.53, 290,566.10 and 115,065.90

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Solution

The fourth proportional to 210,558.53, 290,566.10 and 115,065.90 is: 158,788.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,558.53 : 290,566.10 = 115,065.90 : x
  2. Step 2: Convert to fraction form
    210,558.53/290,566.10 = 115,065.90/x
  3. Step 3: Cross multiply
    210,558.53x = 290,566.10 × 115,065.90
  4. Step 4: Simplify right side
    210,558.53x = 33,434,249,230.66
  5. Step 5: Solve for x
    x = 33,434,249,230.66/210,558.53
  6. Step 6: Final answer
    x = 158,788.39

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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.