Home / 77,678.12-116,519.75-21,518.79

Finding the Fourth Proportional to 77,678.12, 116,519.75 and 21,518.79

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Solution

The fourth proportional to 77,678.12, 116,519.75 and 21,518.79 is: 32,278.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,678.12 : 116,519.75 = 21,518.79 : x
  2. Step 2: Convert to fraction form
    77,678.12/116,519.75 = 21,518.79/x
  3. Step 3: Cross multiply
    77,678.12x = 116,519.75 × 21,518.79
  4. Step 4: Simplify right side
    77,678.12x = 2,507,364,084.90
  5. Step 5: Solve for x
    x = 2,507,364,084.90/77,678.12
  6. Step 6: Final answer
    x = 32,278.90

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1.5x scale

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.