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Finding the Fourth Proportional to 77,690.20, 116,564.10 and 74,810.20

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Solution

The fourth proportional to 77,690.20, 116,564.10 and 74,810.20 is: 112,243.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,690.20 : 116,564.10 = 74,810.20 : x
  2. Step 2: Convert to fraction form
    77,690.20/116,564.10 = 74,810.20/x
  3. Step 3: Cross multiply
    77,690.20x = 116,564.10 × 74,810.20
  4. Step 4: Simplify right side
    77,690.20x = 8,720,183,633.82
  5. Step 5: Solve for x
    x = 8,720,183,633.82/77,690.20
  6. Step 6: Final answer
    x = 112,243.03

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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.