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Finding the Fourth Proportional to 127,911.67, 191,803.59 and 74,621.96

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Solution

The fourth proportional to 127,911.67, 191,803.59 and 74,621.96 is: 111,895.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,911.67 : 191,803.59 = 74,621.96 : x
  2. Step 2: Convert to fraction form
    127,911.67/191,803.59 = 74,621.96/x
  3. Step 3: Cross multiply
    127,911.67x = 191,803.59 × 74,621.96
  4. Step 4: Simplify right side
    127,911.67x = 14,312,759,820.84
  5. Step 5: Solve for x
    x = 14,312,759,820.84/127,911.67
  6. Step 6: Final answer
    x = 111,895.66

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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.