Home / 74,680.36-103,055.90-40,689.12

Finding the Fourth Proportional to 74,680.36, 103,055.90 and 40,689.12

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Solution

The fourth proportional to 74,680.36, 103,055.90 and 40,689.12 is: 56,149.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,680.36 : 103,055.90 = 40,689.12 : x
  2. Step 2: Convert to fraction form
    74,680.36/103,055.90 = 40,689.12/x
  3. Step 3: Cross multiply
    74,680.36x = 103,055.90 × 40,689.12
  4. Step 4: Simplify right side
    74,680.36x = 4,193,253,881.81
  5. Step 5: Solve for x
    x = 4,193,253,881.81/74,680.36
  6. Step 6: Final answer
    x = 56,149.35

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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.