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Finding the Fourth Proportional to 139,412.61, 192,390.58 and 75,750.41

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Solution

The fourth proportional to 139,412.61, 192,390.58 and 75,750.41 is: 104,536.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,412.61 : 192,390.58 = 75,750.41 : x
  2. Step 2: Convert to fraction form
    139,412.61/192,390.58 = 75,750.41/x
  3. Step 3: Cross multiply
    139,412.61x = 192,390.58 × 75,750.41
  4. Step 4: Simplify right side
    139,412.61x = 14,573,665,315.14
  5. Step 5: Solve for x
    x = 14,573,665,315.14/139,412.61
  6. Step 6: Final answer
    x = 104,536.21

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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.