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Finding the Fourth Proportional to 146,918.40, 220,384.80 and 76,934.40

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Solution

The fourth proportional to 146,918.40, 220,384.80 and 76,934.40 is: 115,405.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,918.40 : 220,384.80 = 76,934.40 : x
  2. Step 2: Convert to fraction form
    146,918.40/220,384.80 = 76,934.40/x
  3. Step 3: Cross multiply
    146,918.40x = 220,384.80 × 76,934.40
  4. Step 4: Simplify right side
    146,918.40x = 16,955,172,357.12
  5. Step 5: Solve for x
    x = 16,955,172,357.12/146,918.40
  6. Step 6: Final answer
    x = 115,405.37

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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.