Home / 211,560.28-317,387.12-78,440.56

Finding the Fourth Proportional to 211,560.28, 317,387.12 and 78,440.56

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Solution

The fourth proportional to 211,560.28, 317,387.12 and 78,440.56 is: 117,678.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,560.28 : 317,387.12 = 78,440.56 : x
  2. Step 2: Convert to fraction form
    211,560.28/317,387.12 = 78,440.56/x
  3. Step 3: Cross multiply
    211,560.28x = 317,387.12 × 78,440.56
  4. Step 4: Simplify right side
    211,560.28x = 24,896,023,429.59
  5. Step 5: Solve for x
    x = 24,896,023,429.59/211,560.28
  6. Step 6: Final answer
    x = 117,678.16

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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.