Home / 78,677.76-117,914.58-31,905.12

Finding the Fourth Proportional to 78,677.76, 117,914.58 and 31,905.12

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Solution

The fourth proportional to 78,677.76, 117,914.58 and 31,905.12 is: 47,816.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,677.76 : 117,914.58 = 31,905.12 : x
  2. Step 2: Convert to fraction form
    78,677.76/117,914.58 = 31,905.12/x
  3. Step 3: Cross multiply
    78,677.76x = 117,914.58 × 31,905.12
  4. Step 4: Simplify right side
    78,677.76x = 3,762,078,824.65
  5. Step 5: Solve for x
    x = 3,762,078,824.65/78,677.76
  6. Step 6: Final answer
    x = 47,816.29

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1.5x scale

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.