Home / 78,309.36-117,463.62-19,145.28

Finding the Fourth Proportional to 78,309.36, 117,463.62 and 19,145.28

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Solution

The fourth proportional to 78,309.36, 117,463.62 and 19,145.28 is: 28,717.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,309.36 : 117,463.62 = 19,145.28 : x
  2. Step 2: Convert to fraction form
    78,309.36/117,463.62 = 19,145.28/x
  3. Step 3: Cross multiply
    78,309.36x = 117,463.62 × 19,145.28
  4. Step 4: Simplify right side
    78,309.36x = 2,248,873,894.71
  5. Step 5: Solve for x
    x = 2,248,873,894.71/78,309.36
  6. Step 6: Final answer
    x = 28,717.82

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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.