Home / 55,931.28-77,185-30,780.76

Finding the Fourth Proportional to 55,931.28, 77,185 and 30,780.76

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Solution

The fourth proportional to 55,931.28, 77,185 and 30,780.76 is: 42,477.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,931.28 : 77,185 = 30,780.76 : x
  2. Step 2: Convert to fraction form
    55,931.28/77,185 = 30,780.76/x
  3. Step 3: Cross multiply
    55,931.28x = 77,185 × 30,780.76
  4. Step 4: Simplify right side
    55,931.28x = 2,375,812,960.60
  5. Step 5: Solve for x
    x = 2,375,812,960.60/55,931.28
  6. Step 6: Final answer
    x = 42,477.36

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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.