Home / 70,909.47-106,381.18-20,309.21

Finding the Fourth Proportional to 70,909.47, 106,381.18 and 20,309.21

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Solution

The fourth proportional to 70,909.47, 106,381.18 and 20,309.21 is: 30,468.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,909.47 : 106,381.18 = 20,309.21 : x
  2. Step 2: Convert to fraction form
    70,909.47/106,381.18 = 20,309.21/x
  3. Step 3: Cross multiply
    70,909.47x = 106,381.18 × 20,309.21
  4. Step 4: Simplify right side
    70,909.47x = 2,160,517,192.76
  5. Step 5: Solve for x
    x = 2,160,517,192.76/70,909.47
  6. Step 6: Final answer
    x = 30,468.67

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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.