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Finding the Fourth Proportional to 67,656.80, 101,485.20 and 64,431.20

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Solution

The fourth proportional to 67,656.80, 101,485.20 and 64,431.20 is: 96,646.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,656.80 : 101,485.20 = 64,431.20 : x
  2. Step 2: Convert to fraction form
    67,656.80/101,485.20 = 64,431.20/x
  3. Step 3: Cross multiply
    67,656.80x = 101,485.20 × 64,431.20
  4. Step 4: Simplify right side
    67,656.80x = 6,538,813,218.24
  5. Step 5: Solve for x
    x = 6,538,813,218.24/67,656.80
  6. Step 6: Final answer
    x = 96,646.80

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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.