Home / 81,345.20-121,881.71-53,230.10

Finding the Fourth Proportional to 81,345.20, 121,881.71 and 53,230.10

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Solution

The fourth proportional to 81,345.20, 121,881.71 and 53,230.10 is: 79,756.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,345.20 : 121,881.71 = 53,230.10 : x
  2. Step 2: Convert to fraction form
    81,345.20/121,881.71 = 53,230.10/x
  3. Step 3: Cross multiply
    81,345.20x = 121,881.71 × 53,230.10
  4. Step 4: Simplify right side
    81,345.20x = 6,487,775,135.14
  5. Step 5: Solve for x
    x = 6,487,775,135.14/81,345.20
  6. Step 6: Final answer
    x = 79,756.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.