Home / 135,008.98-186,335.13-78,453.16

Finding the Fourth Proportional to 135,008.98, 186,335.13 and 78,453.16

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Solution

The fourth proportional to 135,008.98, 186,335.13 and 78,453.16 is: 108,278.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,008.98 : 186,335.13 = 78,453.16 : x
  2. Step 2: Convert to fraction form
    135,008.98/186,335.13 = 78,453.16/x
  3. Step 3: Cross multiply
    135,008.98x = 186,335.13 × 78,453.16
  4. Step 4: Simplify right side
    135,008.98x = 14,618,579,595.87
  5. Step 5: Solve for x
    x = 14,618,579,595.87/135,008.98
  6. Step 6: Final answer
    x = 108,278.57

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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.