Home / 219,399.53-302,803.65-128,805.45

Finding the Fourth Proportional to 219,399.53, 302,803.65 and 128,805.45

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Solution

The fourth proportional to 219,399.53, 302,803.65 and 128,805.45 is: 177,770.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,399.53 : 302,803.65 = 128,805.45 : x
  2. Step 2: Convert to fraction form
    219,399.53/302,803.65 = 128,805.45/x
  3. Step 3: Cross multiply
    219,399.53x = 302,803.65 × 128,805.45
  4. Step 4: Simplify right side
    219,399.53x = 39,002,760,399.89
  5. Step 5: Solve for x
    x = 39,002,760,399.89/219,399.53
  6. Step 6: Final answer
    x = 177,770.49

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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.