Home / 78,406.11-117,572.09-30,397.23

Finding the Fourth Proportional to 78,406.11, 117,572.09 and 30,397.23

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Solution

The fourth proportional to 78,406.11, 117,572.09 and 30,397.23 is: 45,581.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,406.11 : 117,572.09 = 30,397.23 : x
  2. Step 2: Convert to fraction form
    78,406.11/117,572.09 = 30,397.23/x
  3. Step 3: Cross multiply
    78,406.11x = 117,572.09 × 30,397.23
  4. Step 4: Simplify right side
    78,406.11x = 3,573,865,709.32
  5. Step 5: Solve for x
    x = 3,573,865,709.32/78,406.11
  6. Step 6: Final answer
    x = 45,581.47

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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.