Home / 140,521.90-210,345.45-81,181.30

Finding the Fourth Proportional to 140,521.90, 210,345.45 and 81,181.30

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Solution

The fourth proportional to 140,521.90, 210,345.45 and 81,181.30 is: 121,519.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,521.90 : 210,345.45 = 81,181.30 : x
  2. Step 2: Convert to fraction form
    140,521.90/210,345.45 = 81,181.30/x
  3. Step 3: Cross multiply
    140,521.90x = 210,345.45 × 81,181.30
  4. Step 4: Simplify right side
    140,521.90x = 17,076,117,080.09
  5. Step 5: Solve for x
    x = 17,076,117,080.09/140,521.90
  6. Step 6: Final answer
    x = 121,519.26

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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.