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Finding the Fourth Proportional to 140,510.78, 210,777.17 and 40,672.47

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Solution

The fourth proportional to 140,510.78, 210,777.17 and 40,672.47 is: 61,011.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,510.78 : 210,777.17 = 40,672.47 : x
  2. Step 2: Convert to fraction form
    140,510.78/210,777.17 = 40,672.47/x
  3. Step 3: Cross multiply
    140,510.78x = 210,777.17 × 40,672.47
  4. Step 4: Simplify right side
    140,510.78x = 8,572,827,920.15
  5. Step 5: Solve for x
    x = 8,572,827,920.15/140,510.78
  6. Step 6: Final answer
    x = 61,011.89

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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.