Home / 135,141.96-186,514.48-77,780.12

Finding the Fourth Proportional to 135,141.96, 186,514.48 and 77,780.12

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Solution

The fourth proportional to 135,141.96, 186,514.48 and 77,780.12 is: 107,347.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,141.96 : 186,514.48 = 77,780.12 : x
  2. Step 2: Convert to fraction form
    135,141.96/186,514.48 = 77,780.12/x
  3. Step 3: Cross multiply
    135,141.96x = 186,514.48 × 77,780.12
  4. Step 4: Simplify right side
    135,141.96x = 14,507,118,636.14
  5. Step 5: Solve for x
    x = 14,507,118,636.14/135,141.96
  6. Step 6: Final answer
    x = 107,347.26

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1.5x scale

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.