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Finding the Fourth Proportional to 113,053.60, 169,434.60 and 86,627.35

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Solution

The fourth proportional to 113,053.60, 169,434.60 and 86,627.35 is: 129,829.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,053.60 : 169,434.60 = 86,627.35 : x
  2. Step 2: Convert to fraction form
    113,053.60/169,434.60 = 86,627.35/x
  3. Step 3: Cross multiply
    113,053.60x = 169,434.60 × 86,627.35
  4. Step 4: Simplify right side
    113,053.60x = 14,677,670,396.31
  5. Step 5: Solve for x
    x = 14,677,670,396.31/113,053.60
  6. Step 6: Final answer
    x = 129,829.31

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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.