Home / 75,090.86-103,455.45-61,640.81

Finding the Fourth Proportional to 75,090.86, 103,455.45 and 61,640.81

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Solution

The fourth proportional to 75,090.86, 103,455.45 and 61,640.81 is: 84,924.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,090.86 : 103,455.45 = 61,640.81 : x
  2. Step 2: Convert to fraction form
    75,090.86/103,455.45 = 61,640.81/x
  3. Step 3: Cross multiply
    75,090.86x = 103,455.45 × 61,640.81
  4. Step 4: Simplify right side
    75,090.86x = 6,377,077,736.91
  5. Step 5: Solve for x
    x = 6,377,077,736.91/75,090.86
  6. Step 6: Final answer
    x = 84,924.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.