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Finding the Fourth Proportional to 76,663.30, 115,000.35 and 43,399.30

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Solution

The fourth proportional to 76,663.30, 115,000.35 and 43,399.30 is: 65,102.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,663.30 : 115,000.35 = 43,399.30 : x
  2. Step 2: Convert to fraction form
    76,663.30/115,000.35 = 43,399.30/x
  3. Step 3: Cross multiply
    76,663.30x = 115,000.35 × 43,399.30
  4. Step 4: Simplify right side
    76,663.30x = 4,990,934,689.76
  5. Step 5: Solve for x
    x = 4,990,934,689.76/76,663.30
  6. Step 6: Final answer
    x = 65,102.01

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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.