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Finding the Fourth Proportional to 74,697.57, 103,080 and 41,990.98

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Solution

The fourth proportional to 74,697.57, 103,080 and 41,990.98 is: 57,946.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,697.57 : 103,080 = 41,990.98 : x
  2. Step 2: Convert to fraction form
    74,697.57/103,080 = 41,990.98/x
  3. Step 3: Cross multiply
    74,697.57x = 103,080 × 41,990.98
  4. Step 4: Simplify right side
    74,697.57x = 4,328,430,218.40
  5. Step 5: Solve for x
    x = 4,328,430,218.40/74,697.57
  6. Step 6: Final answer
    x = 57,946.06

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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.