Home / 79,585.32-119,378.04-20,421

Finding the Fourth Proportional to 79,585.32, 119,378.04 and 20,421

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Solution

The fourth proportional to 79,585.32, 119,378.04 and 20,421 is: 30,631.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,585.32 : 119,378.04 = 20,421 : x
  2. Step 2: Convert to fraction form
    79,585.32/119,378.04 = 20,421/x
  3. Step 3: Cross multiply
    79,585.32x = 119,378.04 × 20,421
  4. Step 4: Simplify right side
    79,585.32x = 2,437,818,954.84
  5. Step 5: Solve for x
    x = 2,437,818,954.84/79,585.32
  6. Step 6: Final answer
    x = 30,631.52

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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.