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Finding the Fourth Proportional to 76,434,688.80, 114,428,084.40 and 67,476,736.80

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Solution

The fourth proportional to 76,434,688.80, 114,428,084.40 and 67,476,736.80 is: 101,017,402.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,434,688.80 : 114,428,084.40 = 67,476,736.80 : x
  2. Step 2: Convert to fraction form
    76,434,688.80/114,428,084.40 = 67,476,736.80/x
  3. Step 3: Cross multiply
    76,434,688.80x = 114,428,084.40 × 67,476,736.80
  4. Step 4: Simplify right side
    76,434,688.80x = 7,721,233,733,586,986
  5. Step 5: Solve for x
    x = 7,721,233,733,586,986/76,434,688.80
  6. Step 6: Final answer
    x = 101,017,402.63

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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.