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Finding the Fourth Proportional to 79,780.62, 119,631.44 and 46,509.06

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Solution

The fourth proportional to 79,780.62, 119,631.44 and 46,509.06 is: 69,740.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,780.62 : 119,631.44 = 46,509.06 : x
  2. Step 2: Convert to fraction form
    79,780.62/119,631.44 = 46,509.06/x
  3. Step 3: Cross multiply
    79,780.62x = 119,631.44 × 46,509.06
  4. Step 4: Simplify right side
    79,780.62x = 5,563,945,937.12
  5. Step 5: Solve for x
    x = 5,563,945,937.12/79,780.62
  6. Step 6: Final answer
    x = 69,740.57

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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.