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Finding the Fourth Proportional to 99,018.56, 136,655.52 and 56,583.44

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Solution

The fourth proportional to 99,018.56, 136,655.52 and 56,583.44 is: 78,090.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,018.56 : 136,655.52 = 56,583.44 : x
  2. Step 2: Convert to fraction form
    99,018.56/136,655.52 = 56,583.44/x
  3. Step 3: Cross multiply
    99,018.56x = 136,655.52 × 56,583.44
  4. Step 4: Simplify right side
    99,018.56x = 7,732,439,416.59
  5. Step 5: Solve for x
    x = 7,732,439,416.59/99,018.56
  6. Step 6: Final answer
    x = 78,090.81

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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.