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Finding the Fourth Proportional to 109,365.72, 163,934.82 and 79,307.16

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Solution

The fourth proportional to 109,365.72, 163,934.82 and 79,307.16 is: 118,878.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,365.72 : 163,934.82 = 79,307.16 : x
  2. Step 2: Convert to fraction form
    109,365.72/163,934.82 = 79,307.16/x
  3. Step 3: Cross multiply
    109,365.72x = 163,934.82 × 79,307.16
  4. Step 4: Simplify right side
    109,365.72x = 13,001,204,999.31
  5. Step 5: Solve for x
    x = 13,001,204,999.31/109,365.72
  6. Step 6: Final answer
    x = 118,878.25

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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.