Home / 51,298.40-76,931.60-20,143.20

Finding the Fourth Proportional to 51,298.40, 76,931.60 and 20,143.20

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Solution

The fourth proportional to 51,298.40, 76,931.60 and 20,143.20 is: 30,208.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,298.40 : 76,931.60 = 20,143.20 : x
  2. Step 2: Convert to fraction form
    51,298.40/76,931.60 = 20,143.20/x
  3. Step 3: Cross multiply
    51,298.40x = 76,931.60 × 20,143.20
  4. Step 4: Simplify right side
    51,298.40x = 1,549,648,605.12
  5. Step 5: Solve for x
    x = 1,549,648,605.12/51,298.40
  6. Step 6: Final answer
    x = 30,208.52

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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.