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Finding the Fourth Proportional to 104,278, 143,902.79 and 56,530.12

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Solution

The fourth proportional to 104,278, 143,902.79 and 56,530.12 is: 78,011.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,278 : 143,902.79 = 56,530.12 : x
  2. Step 2: Convert to fraction form
    104,278/143,902.79 = 56,530.12/x
  3. Step 3: Cross multiply
    104,278x = 143,902.79 × 56,530.12
  4. Step 4: Simplify right side
    104,278x = 8,134,841,704.38
  5. Step 5: Solve for x
    x = 8,134,841,704.38/104,278
  6. Step 6: Final answer
    x = 78,011.10

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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.