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Finding the Fourth Proportional to 123,411.60, 185,117.40 and 115,635.60

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Solution

The fourth proportional to 123,411.60, 185,117.40 and 115,635.60 is: 173,453.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,411.60 : 185,117.40 = 115,635.60 : x
  2. Step 2: Convert to fraction form
    123,411.60/185,117.40 = 115,635.60/x
  3. Step 3: Cross multiply
    123,411.60x = 185,117.40 × 115,635.60
  4. Step 4: Simplify right side
    123,411.60x = 21,406,161,619.44
  5. Step 5: Solve for x
    x = 21,406,161,619.44/123,411.60
  6. Step 6: Final answer
    x = 173,453.40

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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.