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Finding the Fourth Proportional to 67,070.80, 100,460.40 and 40,729.60

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Solution

The fourth proportional to 67,070.80, 100,460.40 and 40,729.60 is: 61,005.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,070.80 : 100,460.40 = 40,729.60 : x
  2. Step 2: Convert to fraction form
    67,070.80/100,460.40 = 40,729.60/x
  3. Step 3: Cross multiply
    67,070.80x = 100,460.40 × 40,729.60
  4. Step 4: Simplify right side
    67,070.80x = 4,091,711,907.84
  5. Step 5: Solve for x
    x = 4,091,711,907.84/67,070.80
  6. Step 6: Final answer
    x = 61,005.86

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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.