Home / 139,780.48-208,497.62-128,317.36

Finding the Fourth Proportional to 139,780.48, 208,497.62 and 128,317.36

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Solution

The fourth proportional to 139,780.48, 208,497.62 and 128,317.36 is: 191,399.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,780.48 : 208,497.62 = 128,317.36 : x
  2. Step 2: Convert to fraction form
    139,780.48/208,497.62 = 128,317.36/x
  3. Step 3: Cross multiply
    139,780.48x = 208,497.62 × 128,317.36
  4. Step 4: Simplify right side
    139,780.48x = 26,753,864,164.68
  5. Step 5: Solve for x
    x = 26,753,864,164.68/139,780.48
  6. Step 6: Final answer
    x = 191,399.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.