Home / 81,695.16-122,490-55,068.12

Finding the Fourth Proportional to 81,695.16, 122,490 and 55,068.12

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Solution

The fourth proportional to 81,695.16, 122,490 and 55,068.12 is: 82,566.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,695.16 : 122,490 = 55,068.12 : x
  2. Step 2: Convert to fraction form
    81,695.16/122,490 = 55,068.12/x
  3. Step 3: Cross multiply
    81,695.16x = 122,490 × 55,068.12
  4. Step 4: Simplify right side
    81,695.16x = 6,745,294,018.80
  5. Step 5: Solve for x
    x = 6,745,294,018.80/81,695.16
  6. Step 6: Final answer
    x = 82,566.63

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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.