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Finding the Fourth Proportional to 140,304.90, 210,455.91 and 81,102.90

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Solution

The fourth proportional to 140,304.90, 210,455.91 and 81,102.90 is: 121,653.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,304.90 : 210,455.91 = 81,102.90 : x
  2. Step 2: Convert to fraction form
    140,304.90/210,455.91 = 81,102.90/x
  3. Step 3: Cross multiply
    140,304.90x = 210,455.91 × 81,102.90
  4. Step 4: Simplify right side
    140,304.90x = 17,068,584,623.14
  5. Step 5: Solve for x
    x = 17,068,584,623.14/140,304.90
  6. Step 6: Final answer
    x = 121,653.52

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1.5x scale

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.