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Finding the Fourth Proportional to 77,421.56, 116,184.12 and 28,173.56

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Solution

The fourth proportional to 77,421.56, 116,184.12 and 28,173.56 is: 42,279.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,421.56 : 116,184.12 = 28,173.56 : x
  2. Step 2: Convert to fraction form
    77,421.56/116,184.12 = 28,173.56/x
  3. Step 3: Cross multiply
    77,421.56x = 116,184.12 × 28,173.56
  4. Step 4: Simplify right side
    77,421.56x = 3,273,320,275.87
  5. Step 5: Solve for x
    x = 3,273,320,275.87/77,421.56
  6. Step 6: Final answer
    x = 42,279.18

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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.