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Finding the Fourth Proportional to 290,155.71, 435,149.33 and 121,671.66

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Solution

The fourth proportional to 290,155.71, 435,149.33 and 121,671.66 is: 182,472.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,155.71 : 435,149.33 = 121,671.66 : x
  2. Step 2: Convert to fraction form
    290,155.71/435,149.33 = 121,671.66/x
  3. Step 3: Cross multiply
    290,155.71x = 435,149.33 × 121,671.66
  4. Step 4: Simplify right side
    290,155.71x = 52,945,340,720.63
  5. Step 5: Solve for x
    x = 52,945,340,720.63/290,155.71
  6. Step 6: Final answer
    x = 182,472.17

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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.