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Finding the Fourth Proportional to 100,953, 139,318.02 and 56,243.88

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Solution

The fourth proportional to 100,953, 139,318.02 and 56,243.88 is: 77,618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,953 : 139,318.02 = 56,243.88 : x
  2. Step 2: Convert to fraction form
    100,953/139,318.02 = 56,243.88/x
  3. Step 3: Cross multiply
    100,953x = 139,318.02 × 56,243.88
  4. Step 4: Simplify right side
    100,953x = 7,835,785,998.72
  5. Step 5: Solve for x
    x = 7,835,785,998.72/100,953
  6. Step 6: Final answer
    x = 77,618.16

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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.