Home / 50,120.81-75,128.54-18,510.72

Finding the Fourth Proportional to 50,120.81, 75,128.54 and 18,510.72

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Solution

The fourth proportional to 50,120.81, 75,128.54 and 18,510.72 is: 27,746.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,120.81 : 75,128.54 = 18,510.72 : x
  2. Step 2: Convert to fraction form
    50,120.81/75,128.54 = 18,510.72/x
  3. Step 3: Cross multiply
    50,120.81x = 75,128.54 × 18,510.72
  4. Step 4: Simplify right side
    50,120.81x = 1,390,683,275.40
  5. Step 5: Solve for x
    x = 1,390,683,275.40/50,120.81
  6. Step 6: Final answer
    x = 27,746.63

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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.