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Finding the Fourth Proportional to 140,973.80, 211,460.70 and 91,207.40

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Solution

The fourth proportional to 140,973.80, 211,460.70 and 91,207.40 is: 136,811.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,973.80 : 211,460.70 = 91,207.40 : x
  2. Step 2: Convert to fraction form
    140,973.80/211,460.70 = 91,207.40/x
  3. Step 3: Cross multiply
    140,973.80x = 211,460.70 × 91,207.40
  4. Step 4: Simplify right side
    140,973.80x = 19,286,780,649.18
  5. Step 5: Solve for x
    x = 19,286,780,649.18/140,973.80
  6. Step 6: Final answer
    x = 136,811.10

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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.