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Finding the Fourth Proportional to 86,908.66, 119,935.65 and 56,713.30

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Solution

The fourth proportional to 86,908.66, 119,935.65 and 56,713.30 is: 78,265.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,908.66 : 119,935.65 = 56,713.30 : x
  2. Step 2: Convert to fraction form
    86,908.66/119,935.65 = 56,713.30/x
  3. Step 3: Cross multiply
    86,908.66x = 119,935.65 × 56,713.30
  4. Step 4: Simplify right side
    86,908.66x = 6,801,946,499.15
  5. Step 5: Solve for x
    x = 6,801,946,499.15/86,908.66
  6. Step 6: Final answer
    x = 78,265.46

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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.