Home / 85,719.40-128,479.74-50,688.52

Finding the Fourth Proportional to 85,719.40, 128,479.74 and 50,688.52

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Solution

The fourth proportional to 85,719.40, 128,479.74 and 50,688.52 is: 75,974.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,719.40 : 128,479.74 = 50,688.52 : x
  2. Step 2: Convert to fraction form
    85,719.40/128,479.74 = 50,688.52/x
  3. Step 3: Cross multiply
    85,719.40x = 128,479.74 × 50,688.52
  4. Step 4: Simplify right side
    85,719.40x = 6,512,447,870.58
  5. Step 5: Solve for x
    x = 6,512,447,870.58/85,719.40
  6. Step 6: Final answer
    x = 75,974.03

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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.