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Finding the Fourth Proportional to 74,990.68, 103,485.18 and 40,998.16

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Solution

The fourth proportional to 74,990.68, 103,485.18 and 40,998.16 is: 56,576.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,990.68 : 103,485.18 = 40,998.16 : x
  2. Step 2: Convert to fraction form
    74,990.68/103,485.18 = 40,998.16/x
  3. Step 3: Cross multiply
    74,990.68x = 103,485.18 × 40,998.16
  4. Step 4: Simplify right side
    74,990.68x = 4,242,701,967.27
  5. Step 5: Solve for x
    x = 4,242,701,967.27/74,990.68
  6. Step 6: Final answer
    x = 56,576.39

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1.5x scale

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.