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Finding the Fourth Proportional to 140,407.58, 193,762.18 and 79,978.20

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Solution

The fourth proportional to 140,407.58, 193,762.18 and 79,978.20 is: 110,369.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,407.58 : 193,762.18 = 79,978.20 : x
  2. Step 2: Convert to fraction form
    140,407.58/193,762.18 = 79,978.20/x
  3. Step 3: Cross multiply
    140,407.58x = 193,762.18 × 79,978.20
  4. Step 4: Simplify right side
    140,407.58x = 15,496,750,384.48
  5. Step 5: Solve for x
    x = 15,496,750,384.48/140,407.58
  6. Step 6: Final answer
    x = 110,369.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.