Home / 78,434.64-117,636.24-38,436.48

Finding the Fourth Proportional to 78,434.64, 117,636.24 and 38,436.48

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Solution

The fourth proportional to 78,434.64, 117,636.24 and 38,436.48 is: 57,647.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,434.64 : 117,636.24 = 38,436.48 : x
  2. Step 2: Convert to fraction form
    78,434.64/117,636.24 = 38,436.48/x
  3. Step 3: Cross multiply
    78,434.64x = 117,636.24 × 38,436.48
  4. Step 4: Simplify right side
    78,434.64x = 4,521,522,986.04
  5. Step 5: Solve for x
    x = 4,521,522,986.04/78,434.64
  6. Step 6: Final answer
    x = 57,647.02

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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.