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Finding the Fourth Proportional to 103,393.32, 155,090.79 and 56,620.68

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Solution

The fourth proportional to 103,393.32, 155,090.79 and 56,620.68 is: 84,931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,393.32 : 155,090.79 = 56,620.68 : x
  2. Step 2: Convert to fraction form
    103,393.32/155,090.79 = 56,620.68/x
  3. Step 3: Cross multiply
    103,393.32x = 155,090.79 × 56,620.68
  4. Step 4: Simplify right side
    103,393.32x = 8,781,345,991.54
  5. Step 5: Solve for x
    x = 8,781,345,991.54/103,393.32
  6. Step 6: Final answer
    x = 84,931.46

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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.