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Finding the Fourth Proportional to 123,378.70, 185,154.45 and 53,308.30

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Solution

The fourth proportional to 123,378.70, 185,154.45 and 53,308.30 is: 79,999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,378.70 : 185,154.45 = 53,308.30 : x
  2. Step 2: Convert to fraction form
    123,378.70/185,154.45 = 53,308.30/x
  3. Step 3: Cross multiply
    123,378.70x = 185,154.45 × 53,308.30
  4. Step 4: Simplify right side
    123,378.70x = 9,870,268,966.94
  5. Step 5: Solve for x
    x = 9,870,268,966.94/123,378.70
  6. Step 6: Final answer
    x = 79,999.78

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1.5x scale

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.