Home / 81,017.28-121,353.12-61,076.16

Finding the Fourth Proportional to 81,017.28, 121,353.12 and 61,076.16

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Solution

The fourth proportional to 81,017.28, 121,353.12 and 61,076.16 is: 91,483.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,017.28 : 121,353.12 = 61,076.16 : x
  2. Step 2: Convert to fraction form
    81,017.28/121,353.12 = 61,076.16/x
  3. Step 3: Cross multiply
    81,017.28x = 121,353.12 × 61,076.16
  4. Step 4: Simplify right side
    81,017.28x = 7,411,782,573.62
  5. Step 5: Solve for x
    x = 7,411,782,573.62/81,017.28
  6. Step 6: Final answer
    x = 91,483.97

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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.