Home / 77,013.20-115,295.16-69,009.68

Finding the Fourth Proportional to 77,013.20, 115,295.16 and 69,009.68

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Solution

The fourth proportional to 77,013.20, 115,295.16 and 69,009.68 is: 103,313.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,013.20 : 115,295.16 = 69,009.68 : x
  2. Step 2: Convert to fraction form
    77,013.20/115,295.16 = 69,009.68/x
  3. Step 3: Cross multiply
    77,013.20x = 115,295.16 × 69,009.68
  4. Step 4: Simplify right side
    77,013.20x = 7,956,482,097.15
  5. Step 5: Solve for x
    x = 7,956,482,097.15/77,013.20
  6. Step 6: Final answer
    x = 103,313.23

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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.