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Finding the Fourth Proportional to 70,840.71, 106,236.05 and 20,907.45

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Solution

The fourth proportional to 70,840.71, 106,236.05 and 20,907.45 is: 31,353.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,840.71 : 106,236.05 = 20,907.45 : x
  2. Step 2: Convert to fraction form
    70,840.71/106,236.05 = 20,907.45/x
  3. Step 3: Cross multiply
    70,840.71x = 106,236.05 × 20,907.45
  4. Step 4: Simplify right side
    70,840.71x = 2,221,124,267.86
  5. Step 5: Solve for x
    x = 2,221,124,267.86/70,840.71
  6. Step 6: Final answer
    x = 31,353.79

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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.