Home / 56,719.40-85,087.20-19,281.20

Finding the Fourth Proportional to 56,719.40, 85,087.20 and 19,281.20

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Solution

The fourth proportional to 56,719.40, 85,087.20 and 19,281.20 is: 28,924.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,719.40 : 85,087.20 = 19,281.20 : x
  2. Step 2: Convert to fraction form
    56,719.40/85,087.20 = 19,281.20/x
  3. Step 3: Cross multiply
    56,719.40x = 85,087.20 × 19,281.20
  4. Step 4: Simplify right side
    56,719.40x = 1,640,583,320.64
  5. Step 5: Solve for x
    x = 1,640,583,320.64/56,719.40
  6. Step 6: Final answer
    x = 28,924.55

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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.