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Finding the Fourth Proportional to 56,520, 77,997.60 and 31,369.68

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Solution

The fourth proportional to 56,520, 77,997.60 and 31,369.68 is: 43,290.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,520 : 77,997.60 = 31,369.68 : x
  2. Step 2: Convert to fraction form
    56,520/77,997.60 = 31,369.68/x
  3. Step 3: Cross multiply
    56,520x = 77,997.60 × 31,369.68
  4. Step 4: Simplify right side
    56,520x = 2,446,759,752.77
  5. Step 5: Solve for x
    x = 2,446,759,752.77/56,520
  6. Step 6: Final answer
    x = 43,290.16

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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.