Home / 81,259.40-121,839.90-53,145.52

Finding the Fourth Proportional to 81,259.40, 121,839.90 and 53,145.52

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Solution

The fourth proportional to 81,259.40, 121,839.90 and 53,145.52 is: 79,686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.40 : 121,839.90 = 53,145.52 : x
  2. Step 2: Convert to fraction form
    81,259.40/121,839.90 = 53,145.52/x
  3. Step 3: Cross multiply
    81,259.40x = 121,839.90 × 53,145.52
  4. Step 4: Simplify right side
    81,259.40x = 6,475,244,842.25
  5. Step 5: Solve for x
    x = 6,475,244,842.25/81,259.40
  6. Step 6: Final answer
    x = 79,686.10

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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.