Home / 81,304.34-121,830.09-56,393.06

Finding the Fourth Proportional to 81,304.34, 121,830.09 and 56,393.06

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Solution

The fourth proportional to 81,304.34, 121,830.09 and 56,393.06 is: 84,501.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,304.34 : 121,830.09 = 56,393.06 : x
  2. Step 2: Convert to fraction form
    81,304.34/121,830.09 = 56,393.06/x
  3. Step 3: Cross multiply
    81,304.34x = 121,830.09 × 56,393.06
  4. Step 4: Simplify right side
    81,304.34x = 6,870,371,668.28
  5. Step 5: Solve for x
    x = 6,870,371,668.28/81,304.34
  6. Step 6: Final answer
    x = 84,501.90

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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.