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Finding the Fourth Proportional to 67,245.88, 92,862.30 and 42,139.12

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Solution

The fourth proportional to 67,245.88, 92,862.30 and 42,139.12 is: 58,191.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,245.88 : 92,862.30 = 42,139.12 : x
  2. Step 2: Convert to fraction form
    67,245.88/92,862.30 = 42,139.12/x
  3. Step 3: Cross multiply
    67,245.88x = 92,862.30 × 42,139.12
  4. Step 4: Simplify right side
    67,245.88x = 3,913,135,603.18
  5. Step 5: Solve for x
    x = 3,913,135,603.18/67,245.88
  6. Step 6: Final answer
    x = 58,191.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.