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Finding the Fourth Proportional to 61,179.80, 91,769.70 and 51,848.60

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Solution

The fourth proportional to 61,179.80, 91,769.70 and 51,848.60 is: 77,772.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,179.80 : 91,769.70 = 51,848.60 : x
  2. Step 2: Convert to fraction form
    61,179.80/91,769.70 = 51,848.60/x
  3. Step 3: Cross multiply
    61,179.80x = 91,769.70 × 51,848.60
  4. Step 4: Simplify right side
    61,179.80x = 4,758,130,467.42
  5. Step 5: Solve for x
    x = 4,758,130,467.42/61,179.80
  6. Step 6: Final answer
    x = 77,772.90

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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.