Home / 86,938.20-130,334.40-45,385.20

Finding the Fourth Proportional to 86,938.20, 130,334.40 and 45,385.20

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Solution

The fourth proportional to 86,938.20, 130,334.40 and 45,385.20 is: 68,039.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,938.20 : 130,334.40 = 45,385.20 : x
  2. Step 2: Convert to fraction form
    86,938.20/130,334.40 = 45,385.20/x
  3. Step 3: Cross multiply
    86,938.20x = 130,334.40 × 45,385.20
  4. Step 4: Simplify right side
    86,938.20x = 5,915,252,810.88
  5. Step 5: Solve for x
    x = 5,915,252,810.88/86,938.20
  6. Step 6: Final answer
    x = 68,039.74

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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.