Home / 78,013.87-117,024.14-30,639.23

Finding the Fourth Proportional to 78,013.87, 117,024.14 and 30,639.23

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Solution

The fourth proportional to 78,013.87, 117,024.14 and 30,639.23 is: 45,960.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,013.87 : 117,024.14 = 30,639.23 : x
  2. Step 2: Convert to fraction form
    78,013.87/117,024.14 = 30,639.23/x
  3. Step 3: Cross multiply
    78,013.87x = 117,024.14 × 30,639.23
  4. Step 4: Simplify right side
    78,013.87x = 3,585,529,985.95
  5. Step 5: Solve for x
    x = 3,585,529,985.95/78,013.87
  6. Step 6: Final answer
    x = 45,960.16

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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.