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Finding the Fourth Proportional to 123,405.60, 185,302.80 and 70,917.60

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Solution

The fourth proportional to 123,405.60, 185,302.80 and 70,917.60 is: 106,488.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,405.60 : 185,302.80 = 70,917.60 : x
  2. Step 2: Convert to fraction form
    123,405.60/185,302.80 = 70,917.60/x
  3. Step 3: Cross multiply
    123,405.60x = 185,302.80 × 70,917.60
  4. Step 4: Simplify right side
    123,405.60x = 13,141,229,849.28
  5. Step 5: Solve for x
    x = 13,141,229,849.28/123,405.60
  6. Step 6: Final answer
    x = 106,488.12

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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.