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Finding the Fourth Proportional to 140,357.88, 210,569.82 and 45,587.72

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Solution

The fourth proportional to 140,357.88, 210,569.82 and 45,587.72 is: 68,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,357.88 : 210,569.82 = 45,587.72 : x
  2. Step 2: Convert to fraction form
    140,357.88/210,569.82 = 45,587.72/x
  3. Step 3: Cross multiply
    140,357.88x = 210,569.82 × 45,587.72
  4. Step 4: Simplify right side
    140,357.88x = 9,599,397,994.61
  5. Step 5: Solve for x
    x = 9,599,397,994.61/140,357.88
  6. Step 6: Final answer
    x = 68,392.30

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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.