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Finding the Fourth Proportional to 77,103.90, 115,655.85 and 45,999.90

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Solution

The fourth proportional to 77,103.90, 115,655.85 and 45,999.90 is: 68,999.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,103.90 : 115,655.85 = 45,999.90 : x
  2. Step 2: Convert to fraction form
    77,103.90/115,655.85 = 45,999.90/x
  3. Step 3: Cross multiply
    77,103.90x = 115,655.85 × 45,999.90
  4. Step 4: Simplify right side
    77,103.90x = 5,320,157,534.42
  5. Step 5: Solve for x
    x = 5,320,157,534.42/77,103.90
  6. Step 6: Final answer
    x = 68,999.85

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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.