Home / 78,528.96-117,816.70-45,272.90

Finding the Fourth Proportional to 78,528.96, 117,816.70 and 45,272.90

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Solution

The fourth proportional to 78,528.96, 117,816.70 and 45,272.90 is: 67,922.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,528.96 : 117,816.70 = 45,272.90 : x
  2. Step 2: Convert to fraction form
    78,528.96/117,816.70 = 45,272.90/x
  3. Step 3: Cross multiply
    78,528.96x = 117,816.70 × 45,272.90
  4. Step 4: Simplify right side
    78,528.96x = 5,333,903,677.43
  5. Step 5: Solve for x
    x = 5,333,903,677.43/78,528.96
  6. Step 6: Final answer
    x = 67,922.76

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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.