Home / 77,731.03-115,990.32-69,353.47

Finding the Fourth Proportional to 77,731.03, 115,990.32 and 69,353.47

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Solution

The fourth proportional to 77,731.03, 115,990.32 and 69,353.47 is: 103,489.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,731.03 : 115,990.32 = 69,353.47 : x
  2. Step 2: Convert to fraction form
    77,731.03/115,990.32 = 69,353.47/x
  3. Step 3: Cross multiply
    77,731.03x = 115,990.32 × 69,353.47
  4. Step 4: Simplify right side
    77,731.03x = 8,044,331,178.41
  5. Step 5: Solve for x
    x = 8,044,331,178.41/77,731.03
  6. Step 6: Final answer
    x = 103,489.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.