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Finding the Fourth Proportional to 78,361.68, 108,139.20 and 44,369.76

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Solution

The fourth proportional to 78,361.68, 108,139.20 and 44,369.76 is: 61,230.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,361.68 : 108,139.20 = 44,369.76 : x
  2. Step 2: Convert to fraction form
    78,361.68/108,139.20 = 44,369.76/x
  3. Step 3: Cross multiply
    78,361.68x = 108,139.20 × 44,369.76
  4. Step 4: Simplify right side
    78,361.68x = 4,798,110,350.59
  5. Step 5: Solve for x
    x = 4,798,110,350.59/78,361.68
  6. Step 6: Final answer
    x = 61,230.32

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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.