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Finding the Fourth Proportional to 76,617.96, 105,721.36 and 43,077.48

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Solution

The fourth proportional to 76,617.96, 105,721.36 and 43,077.48 is: 59,440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,617.96 : 105,721.36 = 43,077.48 : x
  2. Step 2: Convert to fraction form
    76,617.96/105,721.36 = 43,077.48/x
  3. Step 3: Cross multiply
    76,617.96x = 105,721.36 × 43,077.48
  4. Step 4: Simplify right side
    76,617.96x = 4,554,209,770.97
  5. Step 5: Solve for x
    x = 4,554,209,770.97/76,617.96
  6. Step 6: Final answer
    x = 59,440.50

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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.