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Finding the Fourth Proportional to 113,055.60, 169,437.60 and 86,629.35

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Solution

The fourth proportional to 113,055.60, 169,437.60 and 86,629.35 is: 129,832.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,055.60 : 169,437.60 = 86,629.35 : x
  2. Step 2: Convert to fraction form
    113,055.60/169,437.60 = 86,629.35/x
  3. Step 3: Cross multiply
    113,055.60x = 169,437.60 × 86,629.35
  4. Step 4: Simplify right side
    113,055.60x = 14,678,269,153.56
  5. Step 5: Solve for x
    x = 14,678,269,153.56/113,055.60
  6. Step 6: Final answer
    x = 129,832.31

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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.