Home / 76,890.20-115,335.30-66,522.20

Finding the Fourth Proportional to 76,890.20, 115,335.30 and 66,522.20

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Solution

The fourth proportional to 76,890.20, 115,335.30 and 66,522.20 is: 99,783.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,890.20 : 115,335.30 = 66,522.20 : x
  2. Step 2: Convert to fraction form
    76,890.20/115,335.30 = 66,522.20/x
  3. Step 3: Cross multiply
    76,890.20x = 115,335.30 × 66,522.20
  4. Step 4: Simplify right side
    76,890.20x = 7,672,357,893.66
  5. Step 5: Solve for x
    x = 7,672,357,893.66/76,890.20
  6. Step 6: Final answer
    x = 99,783.30

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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.