Home / 80,830.08-121,301.76-45,254.40

Finding the Fourth Proportional to 80,830.08, 121,301.76 and 45,254.40

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Solution

The fourth proportional to 80,830.08, 121,301.76 and 45,254.40 is: 67,913.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,830.08 : 121,301.76 = 45,254.40 : x
  2. Step 2: Convert to fraction form
    80,830.08/121,301.76 = 45,254.40/x
  3. Step 3: Cross multiply
    80,830.08x = 121,301.76 × 45,254.40
  4. Step 4: Simplify right side
    80,830.08x = 5,489,438,367.74
  5. Step 5: Solve for x
    x = 5,489,438,367.74/80,830.08
  6. Step 6: Final answer
    x = 67,913.31

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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.