Home / 74,131.40-102,301.16-40,139.90

Finding the Fourth Proportional to 74,131.40, 102,301.16 and 40,139.90

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Solution

The fourth proportional to 74,131.40, 102,301.16 and 40,139.90 is: 55,392.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,131.40 : 102,301.16 = 40,139.90 : x
  2. Step 2: Convert to fraction form
    74,131.40/102,301.16 = 40,139.90/x
  3. Step 3: Cross multiply
    74,131.40x = 102,301.16 × 40,139.90
  4. Step 4: Simplify right side
    74,131.40x = 4,106,358,332.28
  5. Step 5: Solve for x
    x = 4,106,358,332.28/74,131.40
  6. Step 6: Final answer
    x = 55,392.97

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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.