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Finding the Fourth Proportional to 92,978.76, 128,305.44 and 50,536.98

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Solution

The fourth proportional to 92,978.76, 128,305.44 and 50,536.98 is: 69,738.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,978.76 : 128,305.44 = 50,536.98 : x
  2. Step 2: Convert to fraction form
    92,978.76/128,305.44 = 50,536.98/x
  3. Step 3: Cross multiply
    92,978.76x = 128,305.44 × 50,536.98
  4. Step 4: Simplify right side
    92,978.76x = 6,484,169,455.17
  5. Step 5: Solve for x
    x = 6,484,169,455.17/92,978.76
  6. Step 6: Final answer
    x = 69,738.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.