Home / 78,304.32-117,456.48-19,139.94

Finding the Fourth Proportional to 78,304.32, 117,456.48 and 19,139.94

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Solution

The fourth proportional to 78,304.32, 117,456.48 and 19,139.94 is: 28,709.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,304.32 : 117,456.48 = 19,139.94 : x
  2. Step 2: Convert to fraction form
    78,304.32/117,456.48 = 19,139.94/x
  3. Step 3: Cross multiply
    78,304.32x = 117,456.48 × 19,139.94
  4. Step 4: Simplify right side
    78,304.32x = 2,248,109,979.81
  5. Step 5: Solve for x
    x = 2,248,109,979.81/78,304.32
  6. Step 6: Final answer
    x = 28,709.91

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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.