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Finding the Fourth Proportional to 84,393.76, 116,386.32 and 72,453.28

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Solution

The fourth proportional to 84,393.76, 116,386.32 and 72,453.28 is: 99,919.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,393.76 : 116,386.32 = 72,453.28 : x
  2. Step 2: Convert to fraction form
    84,393.76/116,386.32 = 72,453.28/x
  3. Step 3: Cross multiply
    84,393.76x = 116,386.32 × 72,453.28
  4. Step 4: Simplify right side
    84,393.76x = 8,432,570,631.13
  5. Step 5: Solve for x
    x = 8,432,570,631.13/84,393.76
  6. Step 6: Final answer
    x = 99,919.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.