Home / 209,756.40-289,571.13-142,130.76

Finding the Fourth Proportional to 209,756.40, 289,571.13 and 142,130.76

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Solution

The fourth proportional to 209,756.40, 289,571.13 and 142,130.76 is: 196,213.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,756.40 : 289,571.13 = 142,130.76 : x
  2. Step 2: Convert to fraction form
    209,756.40/289,571.13 = 142,130.76/x
  3. Step 3: Cross multiply
    209,756.40x = 289,571.13 × 142,130.76
  4. Step 4: Simplify right side
    209,756.40x = 41,156,964,780.96
  5. Step 5: Solve for x
    x = 41,156,964,780.96/209,756.40
  6. Step 6: Final answer
    x = 196,213.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.