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Finding the Fourth Proportional to 81,000.90, 121,630.95 and 61,301.70

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Solution

The fourth proportional to 81,000.90, 121,630.95 and 61,301.70 is: 92,050.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.90 : 121,630.95 = 61,301.70 : x
  2. Step 2: Convert to fraction form
    81,000.90/121,630.95 = 61,301.70/x
  3. Step 3: Cross multiply
    81,000.90x = 121,630.95 × 61,301.70
  4. Step 4: Simplify right side
    81,000.90x = 7,456,184,007.62
  5. Step 5: Solve for x
    x = 7,456,184,007.62/81,000.90
  6. Step 6: Final answer
    x = 92,050.63

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1.5x scale

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.