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Finding the Fourth Proportional to 138,872.30, 208,308.45 and 130,124.30

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Solution

The fourth proportional to 138,872.30, 208,308.45 and 130,124.30 is: 195,186.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872.30 : 208,308.45 = 130,124.30 : x
  2. Step 2: Convert to fraction form
    138,872.30/208,308.45 = 130,124.30/x
  3. Step 3: Cross multiply
    138,872.30x = 208,308.45 × 130,124.30
  4. Step 4: Simplify right side
    138,872.30x = 27,105,991,240.34
  5. Step 5: Solve for x
    x = 27,105,991,240.34/138,872.30
  6. Step 6: Final answer
    x = 195,186.45

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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.