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Finding the Fourth Proportional to 79,929.62, 119,690.02 and 77,564.64

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Solution

The fourth proportional to 79,929.62, 119,690.02 and 77,564.64 is: 116,148.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,929.62 : 119,690.02 = 77,564.64 : x
  2. Step 2: Convert to fraction form
    79,929.62/119,690.02 = 77,564.64/x
  3. Step 3: Cross multiply
    79,929.62x = 119,690.02 × 77,564.64
  4. Step 4: Simplify right side
    79,929.62x = 9,283,713,312.89
  5. Step 5: Solve for x
    x = 9,283,713,312.89/79,929.62
  6. Step 6: Final answer
    x = 116,148.60

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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.