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Finding the Fourth Proportional to 77,126.88, 115,612.56 and 58,620

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Solution

The fourth proportional to 77,126.88, 115,612.56 and 58,620 is: 87,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,126.88 : 115,612.56 = 58,620 : x
  2. Step 2: Convert to fraction form
    77,126.88/115,612.56 = 58,620/x
  3. Step 3: Cross multiply
    77,126.88x = 115,612.56 × 58,620
  4. Step 4: Simplify right side
    77,126.88x = 6,777,208,267.20
  5. Step 5: Solve for x
    x = 6,777,208,267.20/77,126.88
  6. Step 6: Final answer
    x = 87,870.90

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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.