Home / 208,128.48-287,218.23-112,635.21

Finding the Fourth Proportional to 208,128.48, 287,218.23 and 112,635.21

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Solution

The fourth proportional to 208,128.48, 287,218.23 and 112,635.21 is: 155,437.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,128.48 : 287,218.23 = 112,635.21 : x
  2. Step 2: Convert to fraction form
    208,128.48/287,218.23 = 112,635.21/x
  3. Step 3: Cross multiply
    208,128.48x = 287,218.23 × 112,635.21
  4. Step 4: Simplify right side
    208,128.48x = 32,350,885,651.88
  5. Step 5: Solve for x
    x = 32,350,885,651.88/208,128.48
  6. Step 6: Final answer
    x = 155,437.09

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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.