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Finding the Fourth Proportional to 76,908.80, 106,116 and 43,368.32

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Solution

The fourth proportional to 76,908.80, 106,116 and 43,368.32 is: 59,838.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,908.80 : 106,116 = 43,368.32 : x
  2. Step 2: Convert to fraction form
    76,908.80/106,116 = 43,368.32/x
  3. Step 3: Cross multiply
    76,908.80x = 106,116 × 43,368.32
  4. Step 4: Simplify right side
    76,908.80x = 4,602,072,645.12
  5. Step 5: Solve for x
    x = 4,602,072,645.12/76,908.80
  6. Step 6: Final answer
    x = 59,838.05

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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.