Home / 342,206.05-513,381.34-128,969.45

Finding the Fourth Proportional to 342,206.05, 513,381.34 and 128,969.45

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Solution

The fourth proportional to 342,206.05, 513,381.34 and 128,969.45 is: 193,481.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,206.05 : 513,381.34 = 128,969.45 : x
  2. Step 2: Convert to fraction form
    342,206.05/513,381.34 = 128,969.45/x
  3. Step 3: Cross multiply
    342,206.05x = 513,381.34 × 128,969.45
  4. Step 4: Simplify right side
    342,206.05x = 66,210,506,493.16
  5. Step 5: Solve for x
    x = 66,210,506,493.16/342,206.05
  6. Step 6: Final answer
    x = 193,481.41

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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.