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Finding the Fourth Proportional to 76,445.80, 114,438.30 and 68,151.40

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Solution

The fourth proportional to 76,445.80, 114,438.30 and 68,151.40 is: 102,021.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,445.80 : 114,438.30 = 68,151.40 : x
  2. Step 2: Convert to fraction form
    76,445.80/114,438.30 = 68,151.40/x
  3. Step 3: Cross multiply
    76,445.80x = 114,438.30 × 68,151.40
  4. Step 4: Simplify right side
    76,445.80x = 7,799,130,358.62
  5. Step 5: Solve for x
    x = 7,799,130,358.62/76,445.80
  6. Step 6: Final answer
    x = 102,021.70

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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.