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Finding the Fourth Proportional to 74,549.53, 102,878.60 and 40,558.01

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Solution

The fourth proportional to 74,549.53, 102,878.60 and 40,558.01 is: 55,970.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,549.53 : 102,878.60 = 40,558.01 : x
  2. Step 2: Convert to fraction form
    74,549.53/102,878.60 = 40,558.01/x
  3. Step 3: Cross multiply
    74,549.53x = 102,878.60 × 40,558.01
  4. Step 4: Simplify right side
    74,549.53x = 4,172,550,956.20
  5. Step 5: Solve for x
    x = 4,172,550,956.20/74,549.53
  6. Step 6: Final answer
    x = 55,970.19

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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.