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Finding the Fourth Proportional to 72,639.70, 108,959.55 and 25,875.70

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Solution

The fourth proportional to 72,639.70, 108,959.55 and 25,875.70 is: 38,813.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,639.70 : 108,959.55 = 25,875.70 : x
  2. Step 2: Convert to fraction form
    72,639.70/108,959.55 = 25,875.70/x
  3. Step 3: Cross multiply
    72,639.70x = 108,959.55 × 25,875.70
  4. Step 4: Simplify right side
    72,639.70x = 2,819,404,627.94
  5. Step 5: Solve for x
    x = 2,819,404,627.94/72,639.70
  6. Step 6: Final answer
    x = 38,813.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.