Home / 55,913.76-77,185.20-39,970.56

Finding the Fourth Proportional to 55,913.76, 77,185.20 and 39,970.56

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Solution

The fourth proportional to 55,913.76, 77,185.20 and 39,970.56 is: 55,176.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,913.76 : 77,185.20 = 39,970.56 : x
  2. Step 2: Convert to fraction form
    55,913.76/77,185.20 = 39,970.56/x
  3. Step 3: Cross multiply
    55,913.76x = 77,185.20 × 39,970.56
  4. Step 4: Simplify right side
    55,913.76x = 3,085,135,667.71
  5. Step 5: Solve for x
    x = 3,085,135,667.71/55,913.76
  6. Step 6: Final answer
    x = 55,176.68

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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.