Home / 138,836.10-208,254.15-128,010.45

Finding the Fourth Proportional to 138,836.10, 208,254.15 and 128,010.45

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Solution

The fourth proportional to 138,836.10, 208,254.15 and 128,010.45 is: 192,015.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,836.10 : 208,254.15 = 128,010.45 : x
  2. Step 2: Convert to fraction form
    138,836.10/208,254.15 = 128,010.45/x
  3. Step 3: Cross multiply
    138,836.10x = 208,254.15 × 128,010.45
  4. Step 4: Simplify right side
    138,836.10x = 26,658,707,455.87
  5. Step 5: Solve for x
    x = 26,658,707,455.87/138,836.10
  6. Step 6: Final answer
    x = 192,015.68

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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.