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Finding the Fourth Proportional to 67,368.80, 101,053.20 and 19,985.60

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Solution

The fourth proportional to 67,368.80, 101,053.20 and 19,985.60 is: 29,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,368.80 : 101,053.20 = 19,985.60 : x
  2. Step 2: Convert to fraction form
    67,368.80/101,053.20 = 19,985.60/x
  3. Step 3: Cross multiply
    67,368.80x = 101,053.20 × 19,985.60
  4. Step 4: Simplify right side
    67,368.80x = 2,019,608,833.92
  5. Step 5: Solve for x
    x = 2,019,608,833.92/67,368.80
  6. Step 6: Final answer
    x = 29,978.40

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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.