Home / 123,530.40-170,359.20-89,769.60

Finding the Fourth Proportional to 123,530.40, 170,359.20 and 89,769.60

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Solution

The fourth proportional to 123,530.40, 170,359.20 and 89,769.60 is: 123,800.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,530.40 : 170,359.20 = 89,769.60 : x
  2. Step 2: Convert to fraction form
    123,530.40/170,359.20 = 89,769.60/x
  3. Step 3: Cross multiply
    123,530.40x = 170,359.20 × 89,769.60
  4. Step 4: Simplify right side
    123,530.40x = 15,293,077,240.32
  5. Step 5: Solve for x
    x = 15,293,077,240.32/123,530.40
  6. Step 6: Final answer
    x = 123,800.11

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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.