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Finding the Fourth Proportional to 74,728.70, 103,125.74 and 40,737.46

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Solution

The fourth proportional to 74,728.70, 103,125.74 and 40,737.46 is: 56,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,728.70 : 103,125.74 = 40,737.46 : x
  2. Step 2: Convert to fraction form
    74,728.70/103,125.74 = 40,737.46/x
  3. Step 3: Cross multiply
    74,728.70x = 103,125.74 × 40,737.46
  4. Step 4: Simplify right side
    74,728.70x = 4,201,080,708.22
  5. Step 5: Solve for x
    x = 4,201,080,708.22/74,728.70
  6. Step 6: Final answer
    x = 56,217.77

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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.