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Finding the Fourth Proportional to 78,628.80, 108,544.80 and 46,353.52

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Solution

The fourth proportional to 78,628.80, 108,544.80 and 46,353.52 is: 63,989.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,628.80 : 108,544.80 = 46,353.52 : x
  2. Step 2: Convert to fraction form
    78,628.80/108,544.80 = 46,353.52/x
  3. Step 3: Cross multiply
    78,628.80x = 108,544.80 × 46,353.52
  4. Step 4: Simplify right side
    78,628.80x = 5,031,433,557.70
  5. Step 5: Solve for x
    x = 5,031,433,557.70/78,628.80
  6. Step 6: Final answer
    x = 63,989.70

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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.