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Finding the Fourth Proportional to 70,874,018.40, 106,428,992.40 and 38,984,200.80

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Solution

The fourth proportional to 70,874,018.40, 106,428,992.40 and 38,984,200.80 is: 58,541,187.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,874,018.40 : 106,428,992.40 = 38,984,200.80 : x
  2. Step 2: Convert to fraction form
    70,874,018.40/106,428,992.40 = 38,984,200.80/x
  3. Step 3: Cross multiply
    70,874,018.40x = 106,428,992.40 × 38,984,200.80
  4. Step 4: Simplify right side
    70,874,018.40x = 4,149,049,210,663,274
  5. Step 5: Solve for x
    x = 4,149,049,210,663,274/70,874,018.40
  6. Step 6: Final answer
    x = 58,541,187.65

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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.