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Finding the Fourth Proportional to 139,412.67, 192,390.66 and 75,750.47

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Solution

The fourth proportional to 139,412.67, 192,390.66 and 75,750.47 is: 104,536.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,412.67 : 192,390.66 = 75,750.47 : x
  2. Step 2: Convert to fraction form
    139,412.67/192,390.66 = 75,750.47/x
  3. Step 3: Cross multiply
    139,412.67x = 192,390.66 × 75,750.47
  4. Step 4: Simplify right side
    139,412.67x = 14,573,681,817.45
  5. Step 5: Solve for x
    x = 14,573,681,817.45/139,412.67
  6. Step 6: Final answer
    x = 104,536.28

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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.