Home / 81,051.24-121,569.56-57,459.89

Finding the Fourth Proportional to 81,051.24, 121,569.56 and 57,459.89

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Solution

The fourth proportional to 81,051.24, 121,569.56 and 57,459.89 is: 86,184.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,051.24 : 121,569.56 = 57,459.89 : x
  2. Step 2: Convert to fraction form
    81,051.24/121,569.56 = 57,459.89/x
  3. Step 3: Cross multiply
    81,051.24x = 121,569.56 × 57,459.89
  4. Step 4: Simplify right side
    81,051.24x = 6,985,372,649.80
  5. Step 5: Solve for x
    x = 6,985,372,649.80/81,051.24
  6. Step 6: Final answer
    x = 86,184.65

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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.