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Finding the Fourth Proportional to 79,509.36, 109,725 and 43,700.32

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Solution

The fourth proportional to 79,509.36, 109,725 and 43,700.32 is: 60,307.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,509.36 : 109,725 = 43,700.32 : x
  2. Step 2: Convert to fraction form
    79,509.36/109,725 = 43,700.32/x
  3. Step 3: Cross multiply
    79,509.36x = 109,725 × 43,700.32
  4. Step 4: Simplify right side
    79,509.36x = 4,795,017,612
  5. Step 5: Solve for x
    x = 4,795,017,612/79,509.36
  6. Step 6: Final answer
    x = 60,307.59

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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.