Home / 76,947.60-115,397.40-30,214.80

Finding the Fourth Proportional to 76,947.60, 115,397.40 and 30,214.80

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Solution

The fourth proportional to 76,947.60, 115,397.40 and 30,214.80 is: 45,312.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,947.60 : 115,397.40 = 30,214.80 : x
  2. Step 2: Convert to fraction form
    76,947.60/115,397.40 = 30,214.80/x
  3. Step 3: Cross multiply
    76,947.60x = 115,397.40 × 30,214.80
  4. Step 4: Simplify right side
    76,947.60x = 3,486,709,361.52
  5. Step 5: Solve for x
    x = 3,486,709,361.52/76,947.60
  6. Step 6: Final answer
    x = 45,312.78

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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.