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Finding the Fourth Proportional to 49,419.76, 74,128.99 and 11,980.17

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Solution

The fourth proportional to 49,419.76, 74,128.99 and 11,980.17 is: 17,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,419.76 : 74,128.99 = 11,980.17 : x
  2. Step 2: Convert to fraction form
    49,419.76/74,128.99 = 11,980.17/x
  3. Step 3: Cross multiply
    49,419.76x = 74,128.99 × 11,980.17
  4. Step 4: Simplify right side
    49,419.76x = 888,077,894.64
  5. Step 5: Solve for x
    x = 888,077,894.64/49,419.76
  6. Step 6: Final answer
    x = 17,970.10

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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.