Home / 138,582.12-191,243.16-74,919.72

Finding the Fourth Proportional to 138,582.12, 191,243.16 and 74,919.72

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Solution

The fourth proportional to 138,582.12, 191,243.16 and 74,919.72 is: 103,389.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,582.12 : 191,243.16 = 74,919.72 : x
  2. Step 2: Convert to fraction form
    138,582.12/191,243.16 = 74,919.72/x
  3. Step 3: Cross multiply
    138,582.12x = 191,243.16 × 74,919.72
  4. Step 4: Simplify right side
    138,582.12x = 14,327,883,999.12
  5. Step 5: Solve for x
    x = 14,327,883,999.12/138,582.12
  6. Step 6: Final answer
    x = 103,389.12

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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.