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Finding the Fourth Proportional to 78,439.74, 108,242.69 and 44,448.63

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Solution

The fourth proportional to 78,439.74, 108,242.69 and 44,448.63 is: 61,336.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.74 : 108,242.69 = 44,448.63 : x
  2. Step 2: Convert to fraction form
    78,439.74/108,242.69 = 44,448.63/x
  3. Step 3: Cross multiply
    78,439.74x = 108,242.69 × 44,448.63
  4. Step 4: Simplify right side
    78,439.74x = 4,811,239,813.18
  5. Step 5: Solve for x
    x = 4,811,239,813.18/78,439.74
  6. Step 6: Final answer
    x = 61,336.76

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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.