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Finding the Fourth Proportional to 255,086.55, 382,636.13 and 121,980.87

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Solution

The fourth proportional to 255,086.55, 382,636.13 and 121,980.87 is: 182,974.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,086.55 : 382,636.13 = 121,980.87 : x
  2. Step 2: Convert to fraction form
    255,086.55/382,636.13 = 121,980.87/x
  3. Step 3: Cross multiply
    255,086.55x = 382,636.13 × 121,980.87
  4. Step 4: Simplify right side
    255,086.55x = 46,674,287,420.93
  5. Step 5: Solve for x
    x = 46,674,287,420.93/255,086.55
  6. Step 6: Final answer
    x = 182,974.32

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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.