Home / 78,389.15-117,583.73-47,208.35

Finding the Fourth Proportional to 78,389.15, 117,583.73 and 47,208.35

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Solution

The fourth proportional to 78,389.15, 117,583.73 and 47,208.35 is: 70,812.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,389.15 : 117,583.73 = 47,208.35 : x
  2. Step 2: Convert to fraction form
    78,389.15/117,583.73 = 47,208.35/x
  3. Step 3: Cross multiply
    78,389.15x = 117,583.73 × 47,208.35
  4. Step 4: Simplify right side
    78,389.15x = 5,550,933,644.10
  5. Step 5: Solve for x
    x = 5,550,933,644.10/78,389.15
  6. Step 6: Final answer
    x = 70,812.53

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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.