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Finding the Fourth Proportional to 123,275.80, 184,445.70 and 81,803.80

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Solution

The fourth proportional to 123,275.80, 184,445.70 and 81,803.80 is: 122,395.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,275.80 : 184,445.70 = 81,803.80 : x
  2. Step 2: Convert to fraction form
    123,275.80/184,445.70 = 81,803.80/x
  3. Step 3: Cross multiply
    123,275.80x = 184,445.70 × 81,803.80
  4. Step 4: Simplify right side
    123,275.80x = 15,088,359,153.66
  5. Step 5: Solve for x
    x = 15,088,359,153.66/123,275.80
  6. Step 6: Final answer
    x = 122,395.14

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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.