Home / 208,136.20-287,228.70-112,642.88

Finding the Fourth Proportional to 208,136.20, 287,228.70 and 112,642.88

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Solution

The fourth proportional to 208,136.20, 287,228.70 and 112,642.88 is: 155,447.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,136.20 : 287,228.70 = 112,642.88 : x
  2. Step 2: Convert to fraction form
    208,136.20/287,228.70 = 112,642.88/x
  3. Step 3: Cross multiply
    208,136.20x = 287,228.70 × 112,642.88
  4. Step 4: Simplify right side
    208,136.20x = 32,354,267,986.66
  5. Step 5: Solve for x
    x = 32,354,267,986.66/208,136.20
  6. Step 6: Final answer
    x = 155,447.58

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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.