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Finding the Fourth Proportional to 61,321, 92,003.70 and 30,178.12

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Solution

The fourth proportional to 61,321, 92,003.70 and 30,178.12 is: 45,278.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,321 : 92,003.70 = 30,178.12 : x
  2. Step 2: Convert to fraction form
    61,321/92,003.70 = 30,178.12/x
  3. Step 3: Cross multiply
    61,321x = 92,003.70 × 30,178.12
  4. Step 4: Simplify right side
    61,321x = 2,776,498,699.04
  5. Step 5: Solve for x
    x = 2,776,498,699.04/61,321
  6. Step 6: Final answer
    x = 45,278.11

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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.