Home / 135,032.64-186,345.06-78,447.66

Finding the Fourth Proportional to 135,032.64, 186,345.06 and 78,447.66

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Solution

The fourth proportional to 135,032.64, 186,345.06 and 78,447.66 is: 108,257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,032.64 : 186,345.06 = 78,447.66 : x
  2. Step 2: Convert to fraction form
    135,032.64/186,345.06 = 78,447.66/x
  3. Step 3: Cross multiply
    135,032.64x = 186,345.06 × 78,447.66
  4. Step 4: Simplify right side
    135,032.64x = 14,618,333,909.56
  5. Step 5: Solve for x
    x = 14,618,333,909.56/135,032.64
  6. Step 6: Final answer
    x = 108,257.78

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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.