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Finding the Fourth Proportional to 148,651.56, 205,138.08 and 80,666.82

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Solution

The fourth proportional to 148,651.56, 205,138.08 and 80,666.82 is: 111,319.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,651.56 : 205,138.08 = 80,666.82 : x
  2. Step 2: Convert to fraction form
    148,651.56/205,138.08 = 80,666.82/x
  3. Step 3: Cross multiply
    148,651.56x = 205,138.08 × 80,666.82
  4. Step 4: Simplify right side
    148,651.56x = 16,547,836,574.51
  5. Step 5: Solve for x
    x = 16,547,836,574.51/148,651.56
  6. Step 6: Final answer
    x = 111,319.63

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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.