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Finding the Fourth Proportional to 74,955.70, 103,438.80 and 41,421.70

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Solution

The fourth proportional to 74,955.70, 103,438.80 and 41,421.70 is: 57,161.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,955.70 : 103,438.80 = 41,421.70 : x
  2. Step 2: Convert to fraction form
    74,955.70/103,438.80 = 41,421.70/x
  3. Step 3: Cross multiply
    74,955.70x = 103,438.80 × 41,421.70
  4. Step 4: Simplify right side
    74,955.70x = 4,284,610,941.96
  5. Step 5: Solve for x
    x = 4,284,610,941.96/74,955.70
  6. Step 6: Final answer
    x = 57,161.91

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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.