Home / 155,454.83-231,969.81-138,699.68

Finding the Fourth Proportional to 155,454.83, 231,969.81 and 138,699.68

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Solution

The fourth proportional to 155,454.83, 231,969.81 and 138,699.68 is: 206,967.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,454.83 : 231,969.81 = 138,699.68 : x
  2. Step 2: Convert to fraction form
    155,454.83/231,969.81 = 138,699.68/x
  3. Step 3: Cross multiply
    155,454.83x = 231,969.81 × 138,699.68
  4. Step 4: Simplify right side
    155,454.83x = 32,174,137,256.81
  5. Step 5: Solve for x
    x = 32,174,137,256.81/155,454.83
  6. Step 6: Final answer
    x = 206,967.76

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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.