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Finding the Fourth Proportional to 67,421.30, 101,177.08 and 27,978.45

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Solution

The fourth proportional to 67,421.30, 101,177.08 and 27,978.45 is: 41,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,421.30 : 101,177.08 = 27,978.45 : x
  2. Step 2: Convert to fraction form
    67,421.30/101,177.08 = 27,978.45/x
  3. Step 3: Cross multiply
    67,421.30x = 101,177.08 × 27,978.45
  4. Step 4: Simplify right side
    67,421.30x = 2,830,777,368.04
  5. Step 5: Solve for x
    x = 2,830,777,368.04/67,421.30
  6. Step 6: Final answer
    x = 41,986.40

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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.