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Finding the Fourth Proportional to 80,946.80, 121,420.20 and 61,263.80

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Solution

The fourth proportional to 80,946.80, 121,420.20 and 61,263.80 is: 91,895.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,946.80 : 121,420.20 = 61,263.80 : x
  2. Step 2: Convert to fraction form
    80,946.80/121,420.20 = 61,263.80/x
  3. Step 3: Cross multiply
    80,946.80x = 121,420.20 × 61,263.80
  4. Step 4: Simplify right side
    80,946.80x = 7,438,662,848.76
  5. Step 5: Solve for x
    x = 7,438,662,848.76/80,946.80
  6. Step 6: Final answer
    x = 91,895.70

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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.