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Finding the Fourth Proportional to 74,985.63, 103,480.16 and 40,994.27

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Solution

The fourth proportional to 74,985.63, 103,480.16 and 40,994.27 is: 56,572.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,985.63 : 103,480.16 = 40,994.27 : x
  2. Step 2: Convert to fraction form
    74,985.63/103,480.16 = 40,994.27/x
  3. Step 3: Cross multiply
    74,985.63x = 103,480.16 × 40,994.27
  4. Step 4: Simplify right side
    74,985.63x = 4,242,092,896.31
  5. Step 5: Solve for x
    x = 4,242,092,896.31/74,985.63
  6. Step 6: Final answer
    x = 56,572.08

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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.