Home / 208,128.86-287,218.75-112,635.59

Finding the Fourth Proportional to 208,128.86, 287,218.75 and 112,635.59

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Solution

The fourth proportional to 208,128.86, 287,218.75 and 112,635.59 is: 155,437.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,128.86 : 287,218.75 = 112,635.59 : x
  2. Step 2: Convert to fraction form
    208,128.86/287,218.75 = 112,635.59/x
  3. Step 3: Cross multiply
    208,128.86x = 287,218.75 × 112,635.59
  4. Step 4: Simplify right side
    208,128.86x = 32,351,051,647.63
  5. Step 5: Solve for x
    x = 32,351,051,647.63/208,128.86
  6. Step 6: Final answer
    x = 155,437.61

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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.