Home / 81,000.20-121,442.65-31,038.05

Finding the Fourth Proportional to 81,000.20, 121,442.65 and 31,038.05

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Solution

The fourth proportional to 81,000.20, 121,442.65 and 31,038.05 is: 46,534.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.20 : 121,442.65 = 31,038.05 : x
  2. Step 2: Convert to fraction form
    81,000.20/121,442.65 = 31,038.05/x
  3. Step 3: Cross multiply
    81,000.20x = 121,442.65 × 31,038.05
  4. Step 4: Simplify right side
    81,000.20x = 3,769,343,042.83
  5. Step 5: Solve for x
    x = 3,769,343,042.83/81,000.20
  6. Step 6: Final answer
    x = 46,534.98

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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.