Home / 74,876.40-103,328.64-40,884.78

Finding the Fourth Proportional to 74,876.40, 103,328.64 and 40,884.78

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Solution

The fourth proportional to 74,876.40, 103,328.64 and 40,884.78 is: 56,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,876.40 : 103,328.64 = 40,884.78 : x
  2. Step 2: Convert to fraction form
    74,876.40/103,328.64 = 40,884.78/x
  3. Step 3: Cross multiply
    74,876.40x = 103,328.64 × 40,884.78
  4. Step 4: Simplify right side
    74,876.40x = 4,224,568,714.10
  5. Step 5: Solve for x
    x = 4,224,568,714.10/74,876.40
  6. Step 6: Final answer
    x = 56,420.56

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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.