Home / 78,389.40-117,503.58-30,985.24

Finding the Fourth Proportional to 78,389.40, 117,503.58 and 30,985.24

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Solution

The fourth proportional to 78,389.40, 117,503.58 and 30,985.24 is: 46,446.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,389.40 : 117,503.58 = 30,985.24 : x
  2. Step 2: Convert to fraction form
    78,389.40/117,503.58 = 30,985.24/x
  3. Step 3: Cross multiply
    78,389.40x = 117,503.58 × 30,985.24
  4. Step 4: Simplify right side
    78,389.40x = 3,640,876,627.16
  5. Step 5: Solve for x
    x = 3,640,876,627.16/78,389.40
  6. Step 6: Final answer
    x = 46,446.03

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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.