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Finding the Fourth Proportional to 245,057.55, 338,139.70 and 153,165.99

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Solution

The fourth proportional to 245,057.55, 338,139.70 and 153,165.99 is: 211,344.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,057.55 : 338,139.70 = 153,165.99 : x
  2. Step 2: Convert to fraction form
    245,057.55/338,139.70 = 153,165.99/x
  3. Step 3: Cross multiply
    245,057.55x = 338,139.70 × 153,165.99
  4. Step 4: Simplify right side
    245,057.55x = 51,791,501,908.80
  5. Step 5: Solve for x
    x = 51,791,501,908.80/245,057.55
  6. Step 6: Final answer
    x = 211,344.24

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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.