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Finding the Fourth Proportional to 74,431.30, 102,713.07 and 40,438.30

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Solution

The fourth proportional to 74,431.30, 102,713.07 and 40,438.30 is: 55,803.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,431.30 : 102,713.07 = 40,438.30 : x
  2. Step 2: Convert to fraction form
    74,431.30/102,713.07 = 40,438.30/x
  3. Step 3: Cross multiply
    74,431.30x = 102,713.07 × 40,438.30
  4. Step 4: Simplify right side
    74,431.30x = 4,153,541,938.58
  5. Step 5: Solve for x
    x = 4,153,541,938.58/74,431.30
  6. Step 6: Final answer
    x = 55,803.70

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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.