Home / 281,309.20-388,206.78-153,987.52

Finding the Fourth Proportional to 281,309.20, 388,206.78 and 153,987.52

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Solution

The fourth proportional to 281,309.20, 388,206.78 and 153,987.52 is: 212,502.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,309.20 : 388,206.78 = 153,987.52 : x
  2. Step 2: Convert to fraction form
    281,309.20/388,206.78 = 153,987.52/x
  3. Step 3: Cross multiply
    281,309.20x = 388,206.78 × 153,987.52
  4. Step 4: Simplify right side
    281,309.20x = 59,778,999,299.39
  5. Step 5: Solve for x
    x = 59,778,999,299.39/281,309.20
  6. Step 6: Final answer
    x = 212,502.82

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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.