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Finding the Fourth Proportional to 245,611.71, 338,939.10 and 138,180.60

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Solution

The fourth proportional to 245,611.71, 338,939.10 and 138,180.60 is: 190,686.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,611.71 : 338,939.10 = 138,180.60 : x
  2. Step 2: Convert to fraction form
    245,611.71/338,939.10 = 138,180.60/x
  3. Step 3: Cross multiply
    245,611.71x = 338,939.10 × 138,180.60
  4. Step 4: Simplify right side
    245,611.71x = 46,834,808,201.46
  5. Step 5: Solve for x
    x = 46,834,808,201.46/245,611.71
  6. Step 6: Final answer
    x = 190,686.38

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1.5x scale

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.