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Finding the Fourth Proportional to 403,139.70, 604,673.10 and 136,908.90

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Solution

The fourth proportional to 403,139.70, 604,673.10 and 136,908.90 is: 205,350.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,139.70 : 604,673.10 = 136,908.90 : x
  2. Step 2: Convert to fraction form
    403,139.70/604,673.10 = 136,908.90/x
  3. Step 3: Cross multiply
    403,139.70x = 604,673.10 × 136,908.90
  4. Step 4: Simplify right side
    403,139.70x = 82,785,128,980.59
  5. Step 5: Solve for x
    x = 82,785,128,980.59/403,139.70
  6. Step 6: Final answer
    x = 205,350.97

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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.