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Finding the Fourth Proportional to 118,730.89, 163,842.51 and 65,005.51

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Solution

The fourth proportional to 118,730.89, 163,842.51 and 65,005.51 is: 89,704.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,730.89 : 163,842.51 = 65,005.51 : x
  2. Step 2: Convert to fraction form
    118,730.89/163,842.51 = 65,005.51/x
  3. Step 3: Cross multiply
    118,730.89x = 163,842.51 × 65,005.51
  4. Step 4: Simplify right side
    118,730.89x = 10,650,665,922.23
  5. Step 5: Solve for x
    x = 10,650,665,922.23/118,730.89
  6. Step 6: Final answer
    x = 89,704.25

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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.