Home / 86,555.39-130,041.18-81,776.12

Finding the Fourth Proportional to 86,555.39, 130,041.18 and 81,776.12

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Solution

The fourth proportional to 86,555.39, 130,041.18 and 81,776.12 is: 122,860.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,555.39 : 130,041.18 = 81,776.12 : x
  2. Step 2: Convert to fraction form
    86,555.39/130,041.18 = 81,776.12/x
  3. Step 3: Cross multiply
    86,555.39x = 130,041.18 × 81,776.12
  4. Step 4: Simplify right side
    86,555.39x = 10,634,262,490.42
  5. Step 5: Solve for x
    x = 10,634,262,490.42/86,555.39
  6. Step 6: Final answer
    x = 122,860.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.