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Finding the Fourth Proportional to 79,320.53, 109,461.65 and 43,509.89

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Solution

The fourth proportional to 79,320.53, 109,461.65 and 43,509.89 is: 60,043.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,320.53 : 109,461.65 = 43,509.89 : x
  2. Step 2: Convert to fraction form
    79,320.53/109,461.65 = 43,509.89/x
  3. Step 3: Cross multiply
    79,320.53x = 109,461.65 × 43,509.89
  4. Step 4: Simplify right side
    79,320.53x = 4,762,664,733.15
  5. Step 5: Solve for x
    x = 4,762,664,733.15/79,320.53
  6. Step 6: Final answer
    x = 60,043.28

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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.