Home / 81,017.52-121,587.72-56,231.28

Finding the Fourth Proportional to 81,017.52, 121,587.72 and 56,231.28

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Solution

The fourth proportional to 81,017.52, 121,587.72 and 56,231.28 is: 84,389.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,017.52 : 121,587.72 = 56,231.28 : x
  2. Step 2: Convert to fraction form
    81,017.52/121,587.72 = 56,231.28/x
  3. Step 3: Cross multiply
    81,017.52x = 121,587.72 × 56,231.28
  4. Step 4: Simplify right side
    81,017.52x = 6,837,033,127.88
  5. Step 5: Solve for x
    x = 6,837,033,127.88/81,017.52
  6. Step 6: Final answer
    x = 84,389.56

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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.