Home / 81,188.98-121,798.59-28,631.86

Finding the Fourth Proportional to 81,188.98, 121,798.59 and 28,631.86

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Solution

The fourth proportional to 81,188.98, 121,798.59 and 28,631.86 is: 42,953.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,188.98 : 121,798.59 = 28,631.86 : x
  2. Step 2: Convert to fraction form
    81,188.98/121,798.59 = 28,631.86/x
  3. Step 3: Cross multiply
    81,188.98x = 121,798.59 × 28,631.86
  4. Step 4: Simplify right side
    81,188.98x = 3,487,320,177.08
  5. Step 5: Solve for x
    x = 3,487,320,177.08/81,188.98
  6. Step 6: Final answer
    x = 42,953.12

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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.